Malicious PDF — malware analysis report

Static analysis result for SHA-256 708421affc096597…

MALICIOUS

PDF

85.8 KB Created: 2021-06-26 18:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f7d02d821362a6116106d5ededa250fc SHA-1: 8ffd4520bb7508c9173ad18e140ab8e2aa7a09a1 SHA-256: 708421affc0965970bc2543a77211b6acaeaa5fae9994a438775479f1d7b93d0
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites. These links are likely intended to lure users into downloading further malicious content or visiting phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdfee26092---gibifan.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/3416ee83e54856d720c4a00aa4739635/dazufifegofatofuxepedoje.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/a139092347232c566a6f8af00baf8cbf/kawezirusegalijavegu.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983ed00bf64---84180714243.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b43637a01cb---21671085731.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/j89up4ec07prja36tsbet171p6/xitopoxepimivojejevafopof.pdf
    • https://contactfm.be/userfiles/files/levijopidugosewisar.pdf
    • http://bhk-aindling.com/userfiles/files/zujevipepopagegazatipa.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/906901917f9af738d4903267fc3f6aeb/27159670666.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a417ce48938---pefobujipotinoziw.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/23a8b255e77d2a8dbda390fdbe6e6960/37961587386.pdf
    • https://vrindaindia.com/php/joseph/uploads/file/97067600062.pdf
    • http://cfacgroupe.com/uploads/FCK_files/file/kokudugotedunakumiwakuvis.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087740ace014---xanusesometafuxi.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/015dc79084605343647e48d69587d1d5/kafezipevilazub.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095cf124d0ff---fasasivamamurukitipivevu.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/4stehvpgcoo2coimngpkh33pso/20979168840.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/d405b655a47eb245e918308442a7f3df/rupatukovumugubeju.pdf
    • http://esistore.be/userfiles/file/81483220822.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/s0a3j5hjv637sl5oh1j4ol65ia/62398687721.pdf
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/divuwobedeba.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/8oudfk2oarpqq5lno8gebfd5b7/gumosikumezizad.pdf
    • http://brandnewgoods.net/userfiles/file/paxorolazetepilolawomu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=free+software+to+convert+pdf+to+word+for+editing
    • 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_off0000ed6e.bin
e0f54cc9a14d1c3cec10ae5e9ba7bb07605e3b7b8fa67e361fbf87418e5b4eae
pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 16544 bytes
font_01_sfnt_off0001182a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1182A 16792 bytes
font_02_sfnt_off00013041.bin
f493f36c2c99d2e1fe00a51d0da21e2e82e9af909490ce66a2f30b867f590e94
pdf-font-stream PDF embedded font (sfnt) at offset 0x13041 10880 bytes