Malicious PDF — malware analysis report

Static analysis result for SHA-256 2466b464cde83231…

MALICIOUS

PDF

84.1 KB Created: 2021-09-05 05:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 0fe1aaa80047bfddc381cc612f89cab6 SHA-1: 8cd887e3946ebbdfd493184278db284246f98232 SHA-256: 2466b464cde83231bade236e4bcf30c8ae9d7426198eab56119c408e01beb1b1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/1mvel1hei7k31lvuigq5e08v9n/50027777318.pdf In PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a89f57357fd---64089586699.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/40110730222.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/2a5221ca7634f4aaee09b6f3173f0eb1/28528624880.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/6782164267.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/v9vndcsanii0pttc5ece5mbu45/juxefaledigirofamolaz.pdfIn PDF document text
    • https://dejavuruse.com/userfiles/file/tugorodalapa.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/fawudesadusav.pdfIn PDF document text
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/nezom.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/zonanamexemefokilavo.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/98454783554.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/hb9h549bp2jglq4vs98h3bl4vm/59259871775.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/12212056317.pdfIn PDF document text
    • http://pi-consulting.ch/download/33329139279.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/09fd2a24c4f81920fd64d8d29b4c6c7e/kolivoge.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5688c54c0e---4175802738.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/43447eeadd3f51532ce8a0bff2de6aa5/37428251798.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/topipijumopoxa.pdfIn PDF document text
    • http://3sdent.com/upload/files/90880984010.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/5drdiptqik3mh2b3vcg6lvgt5r/jibometarezofexiwalolo.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe2fce54f1---87185012869.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/sanunitiworuxob.pdfIn PDF document text
    • http://juicewarenhuis.nl/app/webroot/files/userfiles/files/34489155293.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/a3851d32e4cb243561ef4dac209aeb09/kodofodefiluvimiwelixu.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/fuxebedu.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/6vp118v4gip81gle2gi2amjib8/70850783785.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1609b797fdec03---kalugixipelutatitopajixod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=open+a+new+worksheet+vbaPDF 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_off0000e675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE675 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8C 10620 bytes
SHA-256: 12b4d3d2a4bc410d51f678ad13d921f44d31091ecebd3a8a248d617f54f51931
font_02_sfnt_off000116ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AE 16972 bytes
SHA-256: c301d48a62f4d00373af07132f12dbda6ef09e3bff3ad04a3caf9e71ea211b8d

Open this report in the interactive analyzer, or submit your own file for analysis.