Malicious PDF — malware analysis report

Static analysis result for SHA-256 370410052760e099…

MALICIOUS

PDF

71.7 KB Created: 2021-02-26 16:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: df7f01df511cae0ebfb133429d172e48 SHA-1: 20b688a1de42ae494916c3857662b0018d6a478a SHA-256: 370410052760e099d5041b24f53285e56210d7795dc8329c0c8f9b2b37c04866
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, indicating it functions as a link farm. Several heuristics, including ClamAV and an ML classifier, flagged this PDF as malicious, specifically identifying it as a phishing or trojan-type threat. The embedded URLs, such as https://leonvi.ru/award?keyword=what+does+dreaming+of+pregnant+woman+mean, suggest a potential phishing or SEO manipulation scheme.

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://leonvi.ru/award?keyword=what+does+dreaming+of+pregnant+woman+mean PDF link annotation
    • https://nifudosuv.weebly.com/uploads/1/3/4/0/134040563/b06c576.pdfIn PDF document text
    • https://cdn.sqhk.co/zixapegof/hg2p3rj/world_soccer_challenge_mod_apk_unlimited.pdfIn PDF document text
    • https://pazovazorukilaz.weebly.com/uploads/1/3/4/6/134673506/c21c74eefd0.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/98876097180.pdfIn PDF document text
    • https://burerekubexu.weebly.com/uploads/1/3/1/3/131381452/ruzaja.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/1f058ffc.pdfIn PDF document text
    • https://desaboros.weebly.com/uploads/1/3/5/4/135400021/fc44d034.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/epP4yeI/zombie_sniper_mod_apk.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/how_to_make_a_thermal_imaging_camera.pdfIn PDF document text
    • https://rodefakuwutepez.weebly.com/uploads/1/3/4/3/134341390/databip.pdfIn PDF document text
    • https://todijedesat.weebly.com/uploads/1/3/4/7/134775475/554047ccd8d03.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/what_would_cause_an_abs_light_to_come_on.pdfIn PDF document text
    • https://rofasotukez.weebly.com/uploads/1/3/0/7/130740205/e29fb9.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/dgjxqAn/water_parks_in_tampa_fl_area.pdfIn PDF document text
    • https://vozunekoba.weebly.com/uploads/1/3/4/9/134902797/6359321.pdfIn PDF document text
    • https://puvedevedumu.weebly.com/uploads/1/3/1/4/131406841/7562802.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/pixumumom.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/net._sf._jasperreports_maven_central.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/30217482428.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/kofazorexubabezepegi.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC85 5528 bytes
SHA-256: e87c42ce1a7789f00eba63910afc863ee41c68df33507f3d590b03f71725bb54
font_01_sfnt_off0000ef43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF43 10020 bytes
SHA-256: 198f435301056d89c748eade9b7df47af7a5fa3bf6ad782ff56bf7560debfa6f

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