Malicious PDF — malware analysis report

Static analysis result for SHA-256 0197bee10731436a…

MALICIOUS

PDF

72.1 KB Created: 2021-02-28 06:17:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: fdca2152d217fca75c00bd650f552c01 SHA-1: 59d04f1b7f56546fce3eb270181d65ab2e8e68f4 SHA-256: 0197bee10731436a37ed56e56c5d59ed019aa7c454c9f68968b4ae727a2b91fe
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs hosted on disposable domains, likely for phishing or malware distribution. The document body, though truncated and obfuscated, suggests a lure related to legal dictionaries, which is a common tactic for SEO-based malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/award?keyword=black+law+dictionary+pdf PDF link annotation
    • https://vafoxerosasajox.weebly.com/uploads/1/3/5/3/135398531/5382918.pdfIn PDF document text
    • https://badosajag.weebly.com/uploads/1/3/1/4/131407507/tolomizibo.pdfIn PDF document text
    • https://cdn.sqhk.co/pajugeluj/euLjd1o/romantic_mashup_songs_2019_mp3_free_download.pdfIn PDF document text
    • https://mepifinifiwiza.weebly.com/uploads/1/3/4/3/134334375/jukovizag.pdfIn PDF document text
    • https://cdn.sqhk.co/giwegulatil/fnjiO01/mataxubofes.pdfIn PDF document text
    • https://lomekizawulom.weebly.com/uploads/1/3/4/7/134704223/4216411.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/Duxghie/plant_vs_goblins_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mugegiduveb/iaV1uid/radio_man_the_ultimate_super_hero_fighters.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/EghKMia/xevadotikulakejo.pdfIn PDF document text
    • https://daxixerok.weebly.com/uploads/1/3/4/0/134000062/3e25c3f2.pdfIn PDF document text
    • http://busimaderule.mywebcommunity.org/96978351492.pdfIn PDF document text
    • https://cdn.sqhk.co/gunuzuli/PKjeou3/planets_in_retrograde_june_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/sujutowupolu/fjjrifV/bavepavokedibaxuxof.pdfIn PDF document text
    • https://ripaduwik.weebly.com/uploads/1/3/5/3/135311581/wesatetorezox.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/cOyfjd7/15122914331.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/wings_of_fire_book_16_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/tamireto/5wdWLja/zagowunaj.pdfIn PDF document text
    • https://jusodizepo.weebly.com/uploads/1/3/1/0/131070216/kurowutu_vogoravuved_vamipekawo.pdfIn PDF document text
    • https://pexevirojaloko.weebly.com/uploads/1/3/4/8/134882405/jurikewegowulosenaju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://desejole.myartsonline.com/27647446829.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE549 5280 bytes
SHA-256: 8cb1c3895147426540a0fbc228c56e48a78da78af3b6fb989c1ae4ae70991f03
font_01_sfnt_off0000f76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76D 10160 bytes
SHA-256: 57beaa5856aa78e58e47a1050bda6ff04d8eecc6104c0a7c4e11012b72cebd73

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