Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b226c740fc79abe…

MALICIOUS

PDF

107.0 KB Created: 2021-09-07 05:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 03eb3d8c7fd395fb83c06fbdf7cc0525 SHA-1: a68d4a4940c5b8387e54fe4ccecd8d0aa7f88c3e SHA-256: 9b226c740fc79abe576aa7156848293570a606ab48bd849d1d1e33063ebbc896
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifier with high confidence. It contains numerous external URIs and link farms pointing to potentially compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated and unreadable, but the presence of external links and the overall heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 https://allytemp.ru/uplcv?utm_term=burrito+boyz+menu+pdf PDF link annotation
    • https://fasaac.org/temp/files/geguj.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/kuzinerularixesukix.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110f69eb608b---49078016586.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/45993598626.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/bovenutegodipo.pdfIn PDF document text
    • https://777mto.com/contents//files/29787556863.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/wisuzulofuji.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/nuzebinowu.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/13632580584.pdfIn PDF document text
    • http://whalesart.com/uploadfile/file///2021070105350188.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca1eeb7906---8785292694.pdfIn PDF document text
    • http://washchienluoc.com/upload/file/belozukuzofaxefube.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/1916630340.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/77551280323.pdfIn PDF document text
    • https://vhssirimpanam.org/ckfinder/userfiles/files/43827933380.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/xesagagujotebusod.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824bac1c4e3---87713947660.pdfIn PDF document text
    • http://isotope3.pm-ural.com/uploads/files/58729684913.pdfIn PDF document text
    • http://starlightcelebrates.ca/clients/4/43/43e9139217482d7666ce300faf566241/File/48642153890.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/jigubakose.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/a277f56240527c034fdaf1b8fe726051/gijofeguwon.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/ul2h6q5suaqle0jguhr3gouoes/mowekuvofimiwajon.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/pifon.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c9b4efa7d589b12379ec0dcab21c8c6d/13252655962.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000152bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152BC 19544 bytes
SHA-256: e2e4c3f50a1ecac4d9a9d1ca6081435cf670b9e257a773e7ef175e0b4887a382
font_02_sfnt_off000185dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185DD 10748 bytes
SHA-256: 8e111eff283ae588f9359f0c00caf052fabab8b22b36bbbe07769bf3a5a204f3