Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f405087e9079a2…

MALICIOUS

PDF

81.0 KB Created: 2021-09-16 06:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9a2ebdf3d7f20f3bdaca993cbe29f032 SHA-1: 680db4b05fa847fcdce167837a027a14ac91d43f SHA-256: 76f405087e9079a26728cd9ab10e0073f6130b72487cf45acb3e17a3aebbcb61
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the overall structure and URL analysis point to a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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=kanye+west+life+of+pablo+zip+download PDF link annotation
    • http://ck-tct.ru/userfiles/file/86255515659.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/18902214456.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/legodilani.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/e9b7a727ac2c95dad33972eb93814201/koziwuginoduwasesunekufa.pdfIn PDF document text
    • https://fuoriscena.eu/file/xesizelebozogixe.pdfIn PDF document text
    • https://norservis.cz/files/files/pusenidiwadiribiligedun.pdfIn PDF document text
    • https://norservis.info/files/files/jobezafixogow.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/mosujavanibapagolori.pdfIn PDF document text
    • http://chinalabware.net/d/files/15714627921.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/fivivivazipigeje.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/161353c6118189---88269254975.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/80376581964.pdfIn PDF document text
    • http://jonellchem.com/upload/files/83647621589.pdfIn PDF document text
    • https://upbfassadenbau.com/upload/file/fesugi.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/jilisukelivoviragejaz.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/rewadadakuzetifokoxuta.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb19ea0a4f---35518350608.pdfIn PDF document text
    • http://freeware-software-download.de/uploads/editor/file/javifuvuzinodaviboji.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/98018243429.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/doginidudegufawom.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/fekumoxutez.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130eeb86d1ae---titozetijewiwuke.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/51207774282.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/sopotedavawixepuweruwu.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/59107210843.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_off0000d4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB8 18636 bytes
SHA-256: 2d9b08ddc8add7525c6366d7987f247e91398ec503f5aedfb0832337568f0207
font_02_sfnt_off00011d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D75 10784 bytes
SHA-256: a63d11d3b9ceed8e246ff49ab9dda2bea809a69587335bf0c2510aa01017b23a

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