Malicious PDF — malware analysis report

Static analysis result for SHA-256 be786fa5a70080eb…

MALICIOUS

PDF

100.8 KB Created: 2021-07-14 06:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 9118590abff4c9954479c5f84e0a7e9b SHA-1: 4d15c4be65ec2212c9899faaa97c7049ed1aa7cd SHA-256: be786fa5a70080eb3b2262e4d2c441d90684c2d632f164bf9463a47a8ce504e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting it functions as a link farm or phishing lure. The presence of external URIs and link farms on compromised CMS uploads points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queure.ru/uplcv?utm_term=professional+development+plan+template+for+managers PDF link annotation
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606d17269f921---silabavupeduwek.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/t883qnmif5hgaajkp4u5mhqh0k/tufuxurewoferuwulamezes.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/voliravupaxevujag.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ac64f1b50---33021271622.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49fa790391---62323046000.pdfIn PDF document text
    • https://upaspor.com/resimler/files/buguwudijekoboxo.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/bd477ceaf779e6c605876bf27663deac/sikunazek.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/kudalakuxez.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/b370627280244a2e2243d50cb1acc577/51011032950.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/54cf5429cb25ce9fb1d53bd3d90243bc/rozaveleva.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081657e1d8ff---razotirametelugela.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1184bb3f2---bulijo.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607656fbc6563---woxubevomexifunave.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/55689375568.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/nawatatadezawa.pdfIn PDF document text
    • http://jarosi.hu/files/file/54556787986.pdfIn PDF document text
    • https://inncredel.com/uploads/36447806854.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/neck8a2ma04t5lg3iq3jh79v5t/wudovevuwife.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606fade8eeb09---pigunazerazofuwor.pdfIn PDF document text
    • http://dothi.info/images/files/50573892649.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/b6ac0264d97f319c10d056469b12fd4e/zamutaguxonilejatajera.pdfIn PDF document text
    • http://wamer.org/userfiles/file/jelajefutida.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b99622ecf8---41088640700.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/87254e728f8ce432201c7174ecc92c01/naworuwukipupifafeta.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/92993949803.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/35310191762.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_off00012753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12753 17200 bytes
SHA-256: bbf23aa5868a2764319db2751994510217a3620e9909bd89a0d4299586b6ed0a
font_01_sfnt_off00015467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15467 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C7E 10908 bytes
SHA-256: 5bf7cfe190fd79f2724db9dea6f06a256ecdfd3d9e0dc879de13ff4a0bf33e10

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