Malicious PDF — malware analysis report

Static analysis result for SHA-256 1696064987af2641…

MALICIOUS

PDF

93.2 KB Created: 2020-12-18 03:43:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 6d1e8671a00f7820be2869af51c29228 SHA-1: 143ddbdeb4b7b04564e1c67121cbdd8357c6120e SHA-256: 1696064987af26416b0587a9dbaa0a36090104c77a1b4a66b3981aeafd7e47b0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for building link farms or redirecting users to malicious sites. The heuristic PDF_SEO_LINK_FARM specifically indicates a large number of external PDF links, suggesting a malicious intent to distribute further content or host malicious files. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://trafffe.ru/wb?keyword=icelandic%20alphabet%20pdf PDF link annotation
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/sidobojugonuxexoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375889/normal_5fd095ddb53d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470980/normal_5fda8a0e86ac3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379974/normal_5f9c17b7174b8.pdfIn PDF document text
    • https://sojugadetoju.weebly.com/uploads/1/3/4/6/134683069/7761283.pdfIn PDF document text
    • https://sukizasatesez.weebly.com/uploads/1/3/4/6/134686833/d43cbfd10.pdfIn PDF document text
    • https://judenebubiz.weebly.com/uploads/1/3/4/6/134656374/guvizewev.pdfIn PDF document text
    • https://fopozawiluni.weebly.com/uploads/1/3/4/3/134383369/116091ccf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc3046cc14dfd36feff55ec/t/5fc637914e98326c02e53d37/1606825873457/download_game_epic_race_3d.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/sagoseba.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/mirixadudezupipuluvafan.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/13745906232.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/nopolaruwidolegu.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/48877465480.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1aa53570fb44d1cba4c5/1606294181919/merrill_court_reporting.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0df209955c744b53b696b/t/5fcf5bfd0496d067bdd17c49/1607425022160/zerarinugomimafuri.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1060dae50a014589dcef/1606226017219/322278720.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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63D 4724 bytes
SHA-256: a9f6cd0588d083090f57c555bf854cc446e76c8c638157bb5a27f107263cbb28
font_01_sfnt_off00010621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10621 3056 bytes
SHA-256: 6a0e550766a180d0f0f2b7d0cae4eed948e939e1bd6b31472fa28e991e8563b2
font_02_sfnt_off000112f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F3 15584 bytes
SHA-256: 2cc4543fc95486f787f1ac7c7731c5a11aef549b22c5e8d0e883c61636c395e1
font_03_sfnt_off00014327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14327 16304 bytes
SHA-256: 9a9b4ed3e649ded7281b7bd053f063f4fc5a7b773804e7c68ee7420888750634
font_04_sfnt_off000158d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158D8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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