Malicious PDF — malware analysis report

Static analysis result for SHA-256 432be0a78e46331e…

MALICIOUS

PDF

88.4 KB Created: 2021-07-28 07:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e45a9536af40c259620d9934105c205f SHA-1: 9e2a30d6f9c69fb5e6586795b55514b3ecdae993 SHA-256: 432be0a78e46331eb0e9571fc09e68723083a193be547fed3d4fea6fd39f3c00
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised WordPress upload directories and other domains, suggesting a link farm designed to distribute malware or phish for credentials. The embedded URLs point to potentially malicious PDF files hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d375eeb576---32045079959.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/ribbet68gsd55is3afm2t6jck2/jopabopo.pdf
    • http://cosmikkino.ru/sadm_files/kawigopusimugexuli.pdf
    • http://wrtour.com/FileData/ckfinder/files/20210611_F3B207504E3C3035.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aeed97cc62---68972928146.pdf
    • http://www.icf-plant.com/files/file/zezosoretuziwopuvidovuka.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d61e11090af---rijenukamutitumixitij.pdf
    • http://good163.cn/Uploadfiles/files/44216158489.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160c514d60008f---98790022035.pdf
    • http://zdrowejaja.com/Upload/file/fabavabebawujeliv.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/b2d10d3526704705de02f05ce9518fec/vakabugibadixafu.pdf
    • http://silesiacapital.eu/data/file/dozadaloleguve.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2dd9f57096---89773568346.pdf
    • https://perfecthospitals.com/ckfinder/userfiles/files/91981535310.pdf
    • http://aa-nusd.jp/riroxifojepobugo.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/4omb8sibdeked6rffmkt3l8180/34529007598.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/5d96c9eb3e0c667bad7fe5d3fe3e8810/33406618254.pdf
    • https://eseninternational.com/uploads/files/wunigibideburiwesun.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/dj6916fr5tjbssord9ub5rbkc1/54061464507.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16076589f2c096---98476173302.pdf
    • http://neo-net.info/giganet/files/file/keder.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/ji2gld6tsdl2biqs007se45274/xoguvuxotaz.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d52bdd3379---noluvarukexojiratakipe.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d206e6c323---gekelivomavasetejoxo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=james+bond+all+movies+free+download+in+hindi
    • 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_off0000f389.bin
b052899ac084983862522629ab9e5f9beba94888b4738bab319eee2119c8cfc8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF389 10804 bytes
font_01_sfnt_off00010c41.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C41 16792 bytes
font_02_sfnt_off00012453.bin
d9250617d38460e1a1ec009e5e54638da9bffdca45fb3bfee6ce8ec00ec5a572
pdf-font-stream PDF embedded font (sfnt) at offset 0x12453 17204 bytes