Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6e8c431d84d813…

MALICIOUS

PDF

77.7 KB Created: 2021-03-24 01:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b5fc411e2d5b5c299b5dbb1ba1db80c9 SHA-1: cee5c02fb80ea4a61a643fbc4e5bf67bc58e184e SHA-256: 9c6e8c431d84d8134010f9e0ba9d970037b30bdb34d4bd41ecfd69841be8d448
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many hosted on disposable domains, indicating a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to news feeds and application versions, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=whats+news+feed+on+facebook PDF link annotation
    • https://vidajubobulixi.weebly.com/uploads/1/3/4/6/134650234/zudebitimujakugis.pdfIn PDF document text
    • http://waystep.site/30528635114v9c6p.pdfIn PDF document text
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/37ade.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/ajaMwij/stick_run_hack_version_unlimited_coins_and_gems.pdfIn PDF document text
    • http://naturalm.space/how_to_reset_garmin_s60nyw3f.pdfIn PDF document text
    • http://invitesistem.ru/tabugonefezowovinixarafw8t87.pdfIn PDF document text
    • https://vorupegesozuzow.weebly.com/uploads/1/3/1/4/131453293/vivujol.pdfIn PDF document text
    • http://sarkife.site/tuminakodusevojuxk3q.pdfIn PDF document text
    • http://zootime.store/3117178229844qay.pdfIn PDF document text
    • https://vokubopupabilu.weebly.com/uploads/1/3/4/6/134691430/1515a.pdfIn PDF document text
    • http://rubyshup.space/xuvibenxc1bw.pdfIn PDF document text
    • http://graatorama.space/wujiwenunizdlhz6.pdfIn PDF document text
    • https://zobilajes.weebly.com/uploads/1/3/2/6/132682335/4874541.pdfIn PDF document text
    • https://cdn.sqhk.co/luginuwi/hiisjhC/razofepofekijigagewuren.pdfIn PDF document text
    • http://hookup753.fun/74165117470o1x7h.pdfIn PDF document text
    • https://kafememum.weebly.com/uploads/1/3/4/6/134616831/julapejoke.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/desekusoxi/philippine_advertising_industry_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/ririfodixozusinalorela.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/pofeneverevu.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

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_off0000f2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 5288 bytes
SHA-256: eab9ea5668b0e206e0e6332f1c3ebd2c8bbddf0b128588591f3fa31febc424a6
font_01_sfnt_off000104fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FD 10868 bytes
SHA-256: c7a54753f1eaccc1cb92c3408fefdbf8deae847c18fe8735d13d65c892994c89

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