Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f96ccd3170a6fc…

MALICIOUS

PDF

73.2 KB Created: 2021-06-04 06:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 248ffb009326c34eb1857714ccbe136d SHA-1: 51dfa28a19a4df90967b2426940131d009b9286f SHA-256: c6f96ccd3170a6fc9637a1b9d537e0a9fb80cbaa6e89b96994651907d6e801b7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://crysiq.ru/pbw?utm_term=perdona+si+te+llamo+amor+pdf+descargar+libro+gratis PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4498868/normal_5ff389805dc5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476758/normal_6048392dc27c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379217/normal_5fef51878e151.pdfIn PDF document text
    • https://kazefapakoj.weebly.com/uploads/1/3/4/6/134644741/9797012.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_6045e905caef2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413120/normal_5ffa32d1d87c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_6051621e913d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404502/normal_606ea7a1ad218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_602f57a28c844.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372967/normal_5fedd0831f566.pdfIn PDF document text
    • https://jipovosu.weebly.com/uploads/1/3/4/7/134728388/mubisenovatixor_fekefamofafiv_wusaleganinati_nusofe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493549/normal_5fca3969557f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9e39d3c-de8f-4321-8854-2aca7ac3c90e/how_to_retake_nclex_rn_in_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cba918ef-4e3e-4a38-a7f0-dba54b1923d3/42562965678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad3307d7-f6bc-43ef-a464-9df96b51c6c9/sudivasizilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f40ba5e4-640b-4133-b34e-94613fcb9134/nopim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dafd6105-ce28-456a-9926-7e8eaa002841/buying_second_hand_car_checklist_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/305f5774-d6d9-4134-abb9-f4251bfd8204/xikij.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93A 5616 bytes
SHA-256: 8ca28bfa2e48d831bdf2255a72d130cf09f5a39be3edd064db64661de5d59db9
font_01_sfnt_off0000ec37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC37 12892 bytes
SHA-256: 7b8d612067f55e9364299f1b6709f3ccd61596c7f34a76f91e5fa0256d69f087

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