Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb2184bf45cae6a…

MALICIOUS

PDF

69.4 KB Created: 2021-03-02 23:25:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4dc9f949d1e53a91e703f62499d80595 SHA-1: 382673c7f0bdda680d7cd4db5f4301d00078993f SHA-256: 7fb2184bf45cae6acb10af796d878e0f211e814b9680935b866608a37f388262
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/strik?utm_term=old+vermont+castings+defiant+manual PDF link annotation
    • https://cdn.sqhk.co/kutajanode/Zhfgiig/60519053585.pdfIn PDF document text
    • https://cdn.sqhk.co/vapumojemov/ihghuii/talking_tom_gold_run_hack_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/dzRjpRa/light_up_vanity_mirror_walmart.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/75319027027.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/kiss_the_rain_piano_sheet_roblox.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/cghgdgi/bts_glitch_live_wallpaper_download.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/remexunupubore.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/aSmjiSH/40412613887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494874/normal_6029f6541d475.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/rotopuforova.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/kupixajopanivob.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/31138721606.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416493/normal_601bb74532e4f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/20518585349.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/angry_birds_go_apk_obb_mod.pdfIn PDF document text
    • http://dovunufesesiz.onlinewebshop.net/92035571159.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_off0000d200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD200 5428 bytes
SHA-256: 021cb5adcb102d78ee32991cb4c76a63a38862feced5b13bd666fe99ff7d882b
font_01_sfnt_off0000e463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE463 10468 bytes
SHA-256: 46132c218c867c22a45a2e8b533a9a65c8583c5059f3b58632f429475d055b83