Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ac94056af5dcfc…

MALICIOUS

PDF

80.7 KB Created: 2021-04-05 10:35:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5891b27c2ffefad31b4107aec5fd3ade SHA-1: b62c80c60a62a98d4ee26e2d141a5ad8dd0bd3a6 SHA-256: 92ac94056af5dcfc436e0e40b0f19e32d072422fd9130b3c2eaf3a25be782e83
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'Mini cooper transmission repair near me', likely intended to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/strik?utm_term=mini+cooper+transmission+repair+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501962/normal_605713b5c30fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490736/normal_6031de8955ea0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485001/normal_5ff03f6a14ccd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482405/normal_5fee184d54149.pdfIn PDF document text
    • https://jexesatarufo.weebly.com/uploads/1/3/1/4/131437655/dafipaxa_molosogijati_kisuwaparusa_duzetomiwizuro.pdfIn PDF document text
    • http://giftcard-sale.store/44089171108iv429.pdfIn PDF document text
    • https://rabupipimefife.weebly.com/uploads/1/3/0/8/130874594/371235.pdfIn PDF document text
    • http://distornyup.site/vamujelalogutibewobebariw6p94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418370/normal_5fdde10937702.pdfIn PDF document text
    • http://casbah2point0.com/bs_online_gestion_de_ficheros_manual01hvv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424991/normal_5fd63c1070fd7.pdfIn PDF document text
    • http://klokisik.space/antonio_gramsci_optimism_of_the_will5h9ro.pdfIn PDF document text
    • https://berisojelo.weebly.com/uploads/1/3/0/8/130874511/pivesirerax-nexufafilikij-rejino-petikuko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485580/normal_603d581617103.pdfIn PDF document text
    • http://wowitaly.space/cron_entry_format_in_linuxlblcw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473044/normal_60108fcdc8629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484605/normal_6023f0922724d.pdfIn PDF document text
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/5b327d56951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481271/normal_5feaee0deb7a5.pdfIn PDF document text
    • https://degegoza.weebly.com/uploads/1/3/0/8/130873855/jenixaba.pdfIn PDF document text
    • http://bodyita.space/lubipuguzijuzegota2d22r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448733/normal_5fd8947cb67c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411932/normal_5fc9e5e7e92da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459034/normal_6019cb60cb64e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000feb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB8 5052 bytes
SHA-256: 8967132da4050b2aaf4fdc392be987cfdf88769fdd88761f5af56b9eedf4db7d
font_01_sfnt_off00010fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDB 11036 bytes
SHA-256: 9fcf4fa07d376c04d3091ab22620b3a902048670df89a3591d40f2819f5ed406