Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a788227df95f632…

MALICIOUS

PDF

88.2 KB Created: 2021-07-01 21:19:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 007182ae820daef6e2a8692512190892 SHA-1: 36e1e3846d1f67c679ed2b52ee35e2ca931d2f6c SHA-256: 1a788227df95f632da729b76770b87c687791db8a0f139a24da295c36fe0912d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to compromised WordPress upload directories. These links likely serve as a distribution point for further malicious activity, such as phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607986faa38a8---71063582340.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/p4moekipteg688us9ops54rk1l/44656434209.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/89fc1515881e1557eb5c8dea5692b0b8/62694681297.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724251990c6---25991216334.pdf
    • http://andlupa.com/userfiles/file/35426547550.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/d05heh776lfmfdin7jititblp4/8644009572.pdf
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/zerilu.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8cc996b380---88447520046.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/d6ca699878c76a009552c5dba194cdd4/tezedavetanevikisi.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608571d17cb73---dapujol.pdf
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/ruwimebevijokudakawiginek.pdf
    • https://sonarmusic.hu/up_image/file/wodopitemoteka.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/rgist6pr8tkp6hbcrvd6k9mtsq/68015776766.pdf
    • http://fobosgrunt.ru/files/ckfinder/files/94818406252.pdf
    • https://egyiksem.hu/uploads/file/96744752535.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16071342a6e568---99342240226.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/a6ghomgnv6lb8j73ec2g98ctnp/67924039895.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/u3l7kaas039lqhk1k4u9gfpos1/89294735500.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/6c9f20b84502a5b76301a6e7cf442ccc/71833050329.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf2c46aae4---87625361410.pdf
    • https://psychologgia.pl/Upload/file/besapijitufinosixonedi.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5c949f377---wadimoxodasowixevunikune.pdf
    • http://oreade-breche.fr/userfiles/file/xaxilo.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074976a60627---kezamusekil.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=marriage+proposal+meaning
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1dc.bin
c3ebf673a4dfdb31d9a26027e0f5e6f1c817b2a29bb302678644bb3607104f70
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DC 10492 bytes
font_01_sfnt_off00010995.bin
a8d02d501f151c30ef8117d217bb81be90742c5de9aec69b85bcd96bcb615dea
pdf-font-stream PDF embedded font (sfnt) at offset 0x10995 19948 bytes
font_02_sfnt_off00013c1a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C1A 16792 bytes