Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec5e974991c1639…

MALICIOUS

PDF

70.9 KB Created: 2021-02-01 08:05:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8215d060eaf18795aed3cac3e855dc33 SHA-1: ab412bb2b3f12817e1a2d87807f96a8434c48b82 SHA-256: fec5e974991c1639d04e79533168e13b2d56780cae1d34013f941c181438e4a9
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to games, likely a lure to attract clicks to the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/aws?utm_term=games+like+bitlife+for+android PDF link annotation
    • https://cdn.sqhk.co/wanevakaxuma/gghbjjF/can_we_eat_crow_meat.pdfIn PDF document text
    • http://rineset.xyz/xivugajuwegawejolajwuiuk.pdfIn PDF document text
    • https://zajilonuxiwez.weebly.com/uploads/1/3/4/8/134871265/2119341.pdfIn PDF document text
    • http://workbykoder.xyz/barbarian_weapon_master_nwn4x495.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/cWLvih6/53586343175.pdfIn PDF document text
    • https://xubawiki.weebly.com/uploads/1/3/1/1/131163512/kijebize.pdfIn PDF document text
    • https://pilewamef.weebly.com/uploads/1/3/4/8/134849526/ec2e5e7bcfb967.pdfIn PDF document text
    • https://jubibololir.weebly.com/uploads/1/3/2/8/132814038/61333094a28e46f.pdfIn PDF document text
    • http://wowitaly.pro/xevonemididul8b166.pdfIn PDF document text
    • http://naturalik.fun/341048203558dgrz.pdfIn PDF document text
    • http://1freedom.space/86627774320grcdm.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/akjjidM/96505402118.pdfIn PDF document text
    • https://vekukedabil.weebly.com/uploads/1/3/4/7/134710008/f0b292c5ef20069.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/ijhf6TA/kemopovivitojarewujeti.pdfIn PDF document text
    • https://nizevamil.weebly.com/uploads/1/3/2/8/132814567/tufitojirezofag.pdfIn PDF document text
    • http://yesnutural.space/kukibopuvumakamapukitezbjb89.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E5 5288 bytes
SHA-256: 065bbb080f99a7adcf0952cd6bd61eeef816e301e772c5e8d1582e3e47fb443d
font_01_sfnt_off0000ebcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCD 10252 bytes
SHA-256: 2f42f9760180edc02011bdd7e29e5b6caf076fad93ffaf887f95e3831222a2d7

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