Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34da860404ade65…

MALICIOUS

PDF

91.0 KB Created: 2021-07-26 03:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5e9f7c2e362025286ee4b765f55cb9f2 SHA-1: 0b0a10d34ada5b0797dd00f41e244e7f94571168 SHA-256: e34da860404ade65fd7b8f55cf805f994c5b8eefc0c7cb5e951ae471a39fb3ea
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier strongly indicates this PDF is malicious. It functions as a link farm, directing users to various URLs, some of which are hosted on compromised CMS platforms and appear to be disposable. The heuristic 'SE_INVOICE_LURE' suggests a pretext of payment or invoice, further supporting a phishing or malware distribution attempt. No scripts were extracted, but the structure and URL patterns are consistent with malware droppers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160915573c58d0---tanipavemufesa.pdf In PDF document text
    • http://asfalon.com/__files/file/gaxetediwutoxalugejevoxup.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/rewevitovebuxefiwidimute.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/66921272866.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/videfuzesilen.pdfIn PDF document text
    • http://honda-vo.com/upload/file/65373416763.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/68187591818.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16084ecc7c206f---dewumajinapeg.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/duzupigijinoxur.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/50l98j1vq9mjrh0t532rksekn4/63094634788.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/fokes.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/56824224221.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/dejinuxefa.pdfIn PDF document text
    • https://malayalamfoundation.org/admin/my_files/file/92288467784.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081eff12febd---26042321797.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/disaxoreku.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ce8195509---kodolajufiz.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb3d20c86e---kafepesekilot.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d301a0618---8479339481.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/te9n2h9hsi9ggmecgrder97c83/rixubowox.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/d17273703ed39ea6cbce8dad547534d0/xojenuledimedis.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/3c5bc3494a1a09c0f02e19b806f26471/lurapewifegeji.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210715171908.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba19833f476---fijaxogatokebeziwavoko.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/81399047860.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=terms+and+conditions+for+quotationPDF link annotation
    • 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_off00010265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10265 16508 bytes
SHA-256: a649f0541c5a9dab3b2125956b93743d6e83fe6e3081c250c1ce83b742f6f764
font_01_sfnt_off00012d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D32 10800 bytes
SHA-256: f702b53e383af43fc5bf6af8f79f2c1de5fd10bcf123e301663cf931718b5aa7
font_02_sfnt_off000145e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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