Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4aff07c009613ca…

MALICIOUS

PDF

77.7 KB Created: 2021-08-28 14:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1809c9eb63346e8008d1fcc79b7790ed SHA-1: 4f11503bba738becc879beaf6cce7b68b6683536 SHA-256: e4aff07c009613cae7fce476ff4b7c3163b0d9947c548824d95aad56e9390fca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous external URIs pointing to compromised or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the detected heuristics strongly suggest this PDF is intended to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=fepo4+cation+and+anion PDF link annotation
    • http://theclubburger.com/uploads/files/nenonamaretek.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8f28992bd---puzeliloji.pdfIn PDF document text
    • http://autokolcsonzoszolnok.hu/admin/fck_upload/file/36829064254.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/fidugowasewipobirudi.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/nojnalm8m0pvpq9jua8h20289q/17747163849.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/1927758963.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/68746251976.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/fezukewula.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/76bcfbf33009430e6cc0f7df3fa84b8f/11326684265.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/bibal.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/92468249028.pdfIn PDF document text
    • http://camptagola.com/clients/66689/File/82495047742.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/b3ed870747b9a683f3aec8ea367e1d6e/79011458764.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1611a85b6b85ab---15599720685.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/4401ac47de9b0a3c027273dfa306ca0a/15119683249.pdfIn PDF document text
    • http://rubensova16.cz/files/file/37619416050.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/ea33bffcb180c53960d0523a54071803/7279256223.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/abfc27cfd426e50db0a1bd9821dfcc42/32961926495.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160759cb841ed8---67021504433.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ace3d89a25---viwonunasepa.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/tepivibofax.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/59595294952.pdfIn PDF document text
    • https://noddy.nu/images/file/lakidunupeso.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16103eb4452b67---41196603957.pdfIn PDF document text
    • 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_off0000cc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC20 17612 bytes
SHA-256: 499ce743f8c08b63af23732befd244f3a2ff35cc23f1fae268ebe58cfd12f43f
font_01_sfnt_off0000f953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF953 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001116a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116A 10248 bytes
SHA-256: 3c3b2dca64177f49a7761001590a90fcea46f4158ebdb714203888fdc0c55d26

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