Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba141b8a0e7fc313…

MALICIOUS

PDF

84.7 KB Created: 2021-07-14 02:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f6aefc63983bd1dc11761430581ea2e4 SHA-1: d758bf7e232709255673ec0a88579325d8aaf984 SHA-256: ba141b8a0e7fc31372af4ee9829cef8c438f0e68e40d4b1c1732a4ae6fe695b5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9762

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://hotelbellevuepalermo.com/userfiles/files/zalibelilawe.pdf In PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160b73774449c7---74801455125.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16075358c022fc---mevomutuketekebutujotumug.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/qg73oj6v7gnijcj7mp1labr103/44871341619.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5bc18539b7e2be42dc5bb5954fbd7580/newerenawoledakotaropof.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/34354200096.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5429f19ed4---vizexuropagewepapojuwikoz.pdfIn PDF document text
    • https://ancoraeducacion.com/images/15817098728.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16072285c26da4---76314446411.pdfIn PDF document text
    • https://nadamasristorante.it/file/14033624901.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/sewoxulalijorovuvurazam.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818548e0e64---45047433443.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/tajefobepizaberumoju.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/2a81af4eaf776dd28ea80181ac6828bf/banijaxagekukuradof.pdfIn PDF document text
    • http://quaint-house.com/54253502653.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/db06199874f44d5791477b03653c89fc/tigepivanututa.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4320c7976---95720853245.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077a6207967f---xoleso.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160907173482c6---gupudojulenulisija.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/ahuk57kapqk4fghvlo354vfhtl/dasekemexiperarawamizod.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/tolukoferofeni.pdfIn PDF document text
    • https://keluargamimpi2.com/contents//files/zogeluvedejedezilosibutu.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/90409861790.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d6300418b---dugabepojabezifoj.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/wupuvefi.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a208d1f50---57834479783.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/51985045b945243279804b454fb6bcd4/39574362521.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/58030187269.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=question+answer+of+poem+daddy+fell+into+the+pondPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07D 17096 bytes
SHA-256: 9dc84cf9f6aa6aaf2670cdb73c70a0c76d96032b2784aad3751b234021647ad4
font_01_sfnt_off0000fc44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC44 11124 bytes
SHA-256: 7ac9750ed9c2cb8ac590a675651e6258c1fa0aebc3ed99527b16821ad02df163
font_02_sfnt_off00011639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11639 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4A 16252 bytes
SHA-256: bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4

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