Malicious PDF — malware analysis report

Static analysis result for SHA-256 b247ebb2bcf72a24…

MALICIOUS

PDF

70.9 KB Created: 2021-02-13 19:09:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7e543e91481ca88387eeda69a4d632c8 SHA-1: bf98908a977248a5a4c036e963442f65d426823e SHA-256: b247ebb2bcf72a24b3474d1483c9f59eee2f2ad2ae28b8ad809405df3cbe0377
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to attract search engine traffic. One prominent URL, https://seumenha.ru/wb?keyword=baleno%20car%20images, suggests a lure related to car images. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

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://seumenha.ru/wb?keyword=baleno%20car%20images PDF link annotation
    • https://cdn.sqhk.co/dimowitop/o2t7gfO/kung_fu_panda_3_villain.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446161/normal_60088ac035fde.pdfIn PDF document text
    • https://cdn.sqhk.co/fagisuxupinu/hbMuijf/ftd_coupon_code_september_2020.pdfIn PDF document text
    • https://dabusoze.weebly.com/uploads/1/3/4/5/134585091/zafogefutisob-xawugexupe.pdfIn PDF document text
    • http://ujjjrrrrr.space/74951272655wl60e.pdfIn PDF document text
    • http://pemutoguxo.66ghz.com/vumofijobakakazobironesuv.pdfIn PDF document text
    • https://wigikeketiru.weebly.com/uploads/1/3/1/4/131406435/ponotaxoposem-zutovabawim-xafasepugonun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wedinuvudazoxo.rf.gd/amphibians_book.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/mivenovatasumujoderi.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/susiwefepekevixexe.pdfIn PDF document text
    • http://wukevuwotud.rf.gd/texas_food_handlers_test_answers_learn2serve.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/is_stainless_steel_magnetic_yahoo_answers.pdfIn PDF document text
    • http://ribizotujigotok.rf.gd/kadalonodikijejuzafawela.pdfIn PDF document text
    • http://fitoripuxixanax.epizy.com/android_studio_sqlite_login_example.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/utopia_mobile_game_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC488 5168 bytes
SHA-256: 00b9d3aaf865b69ab8e002bc2807e514270311c3365f765c3e9c2eec8521c5e3
font_01_sfnt_off0000d605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD605 10336 bytes
SHA-256: 0d4d45667dc898748c81e31abd53fd6c1879183f3a552eb568cc82a04980371b
font_02_sfnt_off0000f97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97E 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e

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