Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a17beaac8022bdf…

MALICIOUS

PDF

71.5 KB Created: 2021-03-22 06:45:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 039a84485d6154ff7c9797924fa7c79e SHA-1: 400ef03d8c5dbe9bc0d1a92206cc004d118aca33 SHA-256: 3a17beaac8022bdfa13e323c115177a0380fd9c140a00680a01cb63f7d66dbe4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with a primary one pointing to 'zajinet.ru', suggesting it acts as a lure or redirector. The document's structure and embedded links indicate it is designed to lead users to external, potentially malicious, websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • 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 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://zajinet.ru/wix?keyword=mega+bloks+halo+4+forward+unto+dawn PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491169/normal_60029f8be7f71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378831/normal_5fd86bb3793d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446260/normal_60469c7d952c6.pdfIn PDF document text
    • https://tamusibexo.weebly.com/uploads/1/3/5/9/135966636/feneraxopubo_guludolinodon_fojutebumukuzeb_jikipobewefup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415739/normal_60489c0e77e47.pdfIn PDF document text
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/2893729.pdfIn PDF document text
    • https://vivazezege.weebly.com/uploads/1/3/4/0/134041722/85f3ce.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/hjcjid4/31085630184.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/Jka3Lgd/ravensburger_puzzle_1000_amsterdam.pdfIn PDF document text
    • https://cdn.sqhk.co/pasezateda/djhyhgn/73116103958.pdfIn PDF document text
    • https://taburexil.weebly.com/uploads/1/3/4/3/134374137/mivukowolumunu_puritojalenagoz_tufanajuxurijen.pdfIn PDF document text
    • https://cdn.sqhk.co/norowitidot/o5gdgiP/line_paint_brushes_photoshop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_6026d2a3c7bc1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://julisanusifi.rf.gd/8729151243.pdfIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_b331709a46654f429296cf5f5e748c63.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/biophysical_journal_submission_guidelines.pdfIn PDF document text
    • http://teworubinogo.epizy.com/android_smart_phones_below_5000_mi.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/guided_meditation_for_back_pain.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/32244679632.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/rheumatoid_arthritis_guidelines.pdfIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_45264063d6544a9e91b9bfd914a0ecc7.pdf?index=trueIn PDF document text
    • http://bisegigosos.epizy.com/9221890823.pdfIn PDF document text
    • http://nuvupij.rf.gd/suboru.pdfIn PDF document text
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_b4bba6d8a5204fbcb6eb592beff9fb08.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ditiruz/what_are_the_advantages_and_disadvantages_of_semiconductor_devices.pdfIn PDF document text
    • https://9a1eab6f-da2d-4a41-99bb-18a59f11b130.filesusr.com/ugd/c2b690_00dcfa22c94f4fe8b7c09ef5cde29eaf.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA93 5560 bytes
SHA-256: efb43c90c0cea2d9411c5c3914959e25e011271f812ef00203a3a2edab4e078f
font_01_sfnt_off0000ed9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9B 10148 bytes
SHA-256: 14770cd634acced09465ca281b92e91bc905049384383953430709cfbf486b93