Malicious PDF — malware analysis report

Static analysis result for SHA-256 6500239329a96365…

MALICIOUS

PDF

168.7 KB Created: 2021-07-06 16:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 946a4beabca67c7838f9655dac08e718 SHA-1: 826b211da71e760c21edc9b50948351507249467 SHA-256: 6500239329a96365e05dfdc2428355a8a9029b5cf9298bd1a39dea98fe813e9d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of urgency language further supports a phishing or scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0006fb7f7c---pagutitoxiva.pdf
    • https://holocaustresearch.pl/nowy/photo/file/80159491311.pdf
    • http://mnwebdesign.dk/userfiles/file/wokalomisugisapuwupufox.pdf
    • http://unseretochter.com/images/file/41755410831.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/u861rmd0l99slbdshjbs28ateg/mabivesagi.pdf
    • http://bebelino.ru/userfiles/file/9250627292.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da6e8193f3---kifipinuzewizifizibupato.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160af8f5520247---vuzowojenibugij.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879f1d8a8bd---jilubuvifunepusadodawor.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/42b25ba31b342a36834c8924ff9b5067/97932422280.pdf
    • http://aeronautike.com/userfiles/file/83448816839.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/4027b0fbc7bd1240dcdc4369409c1b62/47353432524.pdf
    • http://kaushalacademy.org/ckfinder/userfiles/files/gakubulawovex.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2d076e101---bozowegese.pdf
    • http://caydinhlang.net/userfiles/image/file/30873501874.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/6f75a8a106b9d92a275fc8b1b754a884/85302526934.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/iskokani3692bd6s853vthvv45/54151527952.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736b6214162---88469209360.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/c5e1ecc2235433ff3934738097a0a3df/98188199073.pdf
    • https://carrieres-pierre.com/userfiles/file/ximavinabevokililunogi.pdf
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/zejosijidikikow.pdf
    • http://saydersan.com/firma/files/fukupamup.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071fae40a9e4---gapinogu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=the+bright+and+morning+star
    • 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_off0002374b.bin
dddc0101d2cd89563759652fd18a49e7239c185a16478045610a83b8900c7326
pdf-font-stream PDF embedded font (sfnt) at offset 0x2374B 10752 bytes
font_01_sfnt_off00024f9b.bin
acdf804a1c02c3da53a1b250262dcaa928b7d57a216c405e47233ed5eff7fa40
pdf-font-stream PDF embedded font (sfnt) at offset 0x24F9B 17464 bytes
font_02_sfnt_off00027cfd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x27CFD 16792 bytes