Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc9372d15a7fa6eb…

MALICIOUS

PDF

80.5 KB Created: 2021-03-29 04:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6ce2de7ad5388776b27a7a0de636da0d SHA-1: 5615efa18ced0a572afd73fe8dc10d3526451f8d SHA-256: dc9372d15a7fa6eb828ff2777a59334c46ccc3669ff5b4c63d8244821cf0a5e9
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, many of which point to PDF files, suggesting a link farm or a method to obscure malicious destinations. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/strik?utm_term=fender+mustang+v2+20w PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426572/normal_5fc647778880b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455883/normal_5fc9afa17cae7.pdfIn PDF document text
    • http://vobajujabu.mywebcommunity.org/virenojomof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415061/normal_5fe4a1850db63.pdfIn PDF document text
    • http://medolufinumul.sportsontheweb.net/likisejetibeniposizazer.pdfIn PDF document text
    • https://cdn.sqhk.co/furaxofir/igcgdjc/xadagitutib.pdfIn PDF document text
    • http://larokamexi.sportsontheweb.net/fipipagefurojogajesen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388037/normal_602f00a782f6e.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Cm9jfWu/13324013923.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374532/normal_60091ecd58399.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415951/normal_5fccb4eaeb69d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475196/normal_5fd2d245e3114.pdfIn PDF document text
    • https://cdn.sqhk.co/perolurowona/jdgibrr/metew.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/cgghgjf/train_shunting_puzzle_2.pdfIn PDF document text
    • https://cdn.sqhk.co/zokelofid/bZArif0/tonosesoduzedawule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://natizuf.onlinewebshop.net/duruv.pdfIn PDF document text
    • https://aca292c6-a3ee-4c96-b4c9-db15c8eca1b9.filesusr.com/ugd/cd1d52_bd2a1c6befd5420d9442ddee60ffb8a7.pdf?index=trueIn PDF document text
    • https://9f61dd91-ea7e-4edc-a837-c43fae5dccfb.filesusr.com/ugd/ed897c_40d6b8a87f4141d8ab9871f312d3bcf9.pdf?index=trueIn PDF document text
    • https://18cceff7-6d50-42ec-9d85-67184b61345e.filesusr.com/ugd/8c2e83_5fac03caf3784e45879448604bd37a00.pdf?index=trueIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_ca353acf217f411e8c39f4c9b3131fa8.pdf?index=trueIn PDF document text
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_1e779ba97acf4c018261577d8e2d18bc.pdf?index=trueIn PDF document text
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_82b8520085444ed3b7054873aa80ae8f.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFA 5496 bytes
SHA-256: 2ea769e0b01ea3a97f365a62b917e47ebb2652ca8ddfa2e1793c3fb8706a5fc5
font_01_sfnt_off00010ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA9 11224 bytes
SHA-256: c6b036265d7ba2b241dba814186a7f30124514352ebe65d448b4bd0b419d692a

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