Malicious PDF — malware analysis report

Static analysis result for SHA-256 b91a08196b7e7999…

MALICIOUS

PDF

84.1 KB Created: 2021-01-15 16:21:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3f1239099cb843fce8da117d3c9b47d3 SHA-1: 2c764da138f0c65d3541e2b65fa50151b084fd3d SHA-256: b91a08196b7e799925f4450f45293022800f5b9feaf376997a4f19f18a994b26
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though partially corrupted, suggests a lure related to 'Bittitan migrationwiz guide', aligning with phishing tactics. The presence of multiple external PDF links and a critical heuristic firing for malicious redirectors indicates an attempt to lead users to malicious content or downloads.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://cctraff.ru/aws?utm_term=bittitan+migrationwiz+guide In PDF document text
    • https://judexibegajojid.weebly.com/uploads/1/3/4/8/134885636/4532474.pdfIn PDF document text
    • https://site-1175062.mozfiles.com/files/1175062/xasabena.pdfIn PDF document text
    • https://site-1176039.mozfiles.com/files/1176039/coffee_inc_game_beans.pdfIn PDF document text
    • https://site-1175023.mozfiles.com/files/1175023/zitevekudakosa.pdfIn PDF document text
    • https://nifazupu.weebly.com/uploads/1/3/4/5/134507595/8f9fb841a02dcf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378382/normal_5fb7085b268b2.pdfIn PDF document text
    • https://site-1178598.mozfiles.com/files/1178598/online_multiplayer_racing_games_browser.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/baritexovopa/39635203826.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/android_linux_file_transfer.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/43331180632.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/mofilopalixoteruve.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/what_is_the_law_of_color_with_cosmetology.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/23821999537.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/49760726414.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_off0000f6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E0 5124 bytes
SHA-256: d91f8207611493796e9e848faa9f1c2d0227a3ed4fab7d03dd3c49fcd3a533e5
font_01_sfnt_off00010854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10854 11124 bytes
SHA-256: e1d6c235ced7ca8563b6eca648f389a836201f5a1d9dba5870322acc4ec5c8f9
font_02_sfnt_off00012e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E81 16084 bytes
SHA-256: 197e24eef2a53dce23e9c32f34a86c4814fc29b4f939dc2d36251d6689df385c

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