Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d8901f67759170…

MALICIOUS

PDF

77.9 KB Created: 2020-12-03 23:59:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 72f10beea815a1c5d62c2990556a8e0d SHA-1: 127233bc964f78a6f945be894d54ffe3dc59a020 SHA-256: 08d8901f6775917060eb113dd2476e72b7603ec6ef5fb7f503593db934f5ce57
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external PDF documents, forming a link farm, and also redirects to a known malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves redirecting users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://traffine.ru/strik?utm_term=never+gymless+pdf In PDF document text
    • https://bejogagufuse.weebly.com/uploads/1/3/4/3/134385068/xofazole_ligiju_xabamimewug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f889475a23b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f999422e75e8.pdfIn PDF document text
    • https://mejulima.weebly.com/uploads/1/3/4/0/134040536/c5403b1125eff7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458389/normal_5fa1800b7f021.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc78ef503f04e270fe537c2/t/5fc7caab12b0cc7797409fd9/1606929070217/fopufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06181bfa-6b0d-4ce2-ac86-ffbf43f20bc7/broadmoor_high_school_baton_rouge_logo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/006d852d-c0b6-44d7-acc8-a7e3c112bc93/dusoveduwiteri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd3709eb-17f1-421a-99e5-13edb921de4c/lornars_pass_hero_points.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0bc8a7848ba205d17b7b8/t/5fc1804f3f75b166430d4898/1606516816588/enhancement_shaman_artifact_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8409d979-5a98-410b-a797-ed47bc4c9e83/24235649329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe6155d-874a-4d1a-ba49-1cd34e282613/jazimojazamepopetakokudix.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25C 5284 bytes
SHA-256: 68c8f9d92a91da0d7a342edad7da54e63ef8ce440738ee6620a735a7d53fef58
font_01_sfnt_off0001045e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045E 11332 bytes
SHA-256: ca712e8dcf189cccb77aa4f4948126ffc2f7f0926cbc2a8896bd6607a2cfbec5

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