Malicious PDF — malware analysis report

Static analysis result for SHA-256 5539537c64ce9546…

MALICIOUS

PDF

71.9 KB Created: 2020-12-22 06:20:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6fe18ee249b7be5438537211c78e33d3 SHA-1: 6291cb2c2307098682cee7a790117131c7eb76c5 SHA-256: 5539537c64ce954636ef642eb329a398bd3a2d44e77b36230f4c5177ab3d5bd0
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 0.9997

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://traffset.ru/strik?utm_term=carrera+slot+car+tracks+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380523/normal_5fa0b1fb9564c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465685/normal_5fd30985e2a75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381531/normal_5fcb00337fa37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f88ccc330051.pdfIn PDF document text
    • https://magalezofutik.weebly.com/uploads/1/3/4/5/134599277/pazotanafusari-wiwol-fuwaromukewuz-daruzafafajo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387922/normal_5fa74a799ba0c.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/5fe01379c3067052edaf7cab/t/5fe1106e668a647645a76552/1608585326739/abcd_movie_video_mp4.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11355ab79f442f22aa123/t/5fcea0e57bca2b4c4f2ac5ec/1607377126219/vigojubi.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/what_about_you_meaning_in_english_answer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0879da3bf4b14aba759f2/t/5fc25478a97599144e43376f/1606571130355/14181234788.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e99a0a2757459be2ef6a/t/5fc20482173fb5383be9393f/1606550658950/living_room_theaters_portland_or_97205.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/95794249125.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12a1c9698b02c7f224c6f/t/5fc3244b145a8629dc178b12/1606624331510/algebra_1_common_core_answers_2016.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_off0000de76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE76 4844 bytes
SHA-256: 912f727fa947ba6e1e31549055b0524135d959c4b2397c5c2fac21b8802008cf
font_01_sfnt_off0000eefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFC 10480 bytes
SHA-256: cd55a5ddc4973a2e485304758fe0c5434e8f20817c0706b0f3f2b61951cf0178

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