Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0206605cf3f9ac…

MALICIOUS

PDF

82.7 KB Created: 2020-12-25 15:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: de1ced39023b606275ffe969be620d8d SHA-1: 40f1a41219f3313cdcd50a6a7b02d3490322e110 SHA-256: ba0206605cf3f9ac0c1e75036d99235edb3d4b57a9b9e7edc0f805be480a4ef7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, indicated by the 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to direct users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were directly extracted, the nature of the link farm and the embedded URLs point towards a phishing or malicious redirection attack.

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 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.
  • 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://traffking.ru/strik?utm_term=cisco+asa+5525-+x+adaptive+security+appliance+eol PDF link annotation
    • https://cdn.sqhk.co/masamiwe/1HYhghg/driving_professors_permit_test.pdfIn PDF document text
    • https://rogapunuki.weebly.com/uploads/1/3/4/3/134375427/1669681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410431/normal_5f93c9c5876c5.pdfIn PDF document text
    • https://balesiloruj.weebly.com/uploads/1/3/4/6/134671801/40903748c.pdfIn PDF document text
    • https://walisisatar.weebly.com/uploads/1/3/4/5/134576301/6155833.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvutose/q6gdjbz/29828556436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5f885ccbdbf7a.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/4267771.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/7035658.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/xoguwavosuje/adarsh_shinde_ambedkar_song.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/bushnell_yardage_pro_800_rangefinder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22d45594-ce08-4a5c-9056-95afa96f212e/85015589714.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/words_that_start_with_ber.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e23a18d6-6533-4fa6-8827-c95888f65d93/37958623553.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/29758353268.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/dedazogidurotir.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D3 5492 bytes
SHA-256: fcad4103d9934418651f5983d8474c5ee7bdb245b89d6858eeba976d854ba8e2
font_01_sfnt_off0000fbac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAC 14440 bytes
SHA-256: cfad8a63c44b7cfcae7a26abb1ab4d2bc50a7ab79aa0ffc7417429a899440fcf
font_02_sfnt_off0001282c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282C 16060 bytes
SHA-256: eb67323a3edc51f073cf7ae7c668a4400309481d93a41d1ca3bfc03d889966df

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