Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17f5a9c3006505c…

MALICIOUS

PDF

72.0 KB Created: 2020-11-29 04:25:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ba9dc76a38047e3dc588002b907c66ed SHA-1: de2ec72c42d9a30b106a7453639ae1e541bec831 SHA-256: b17f5a9c3006505c503431ff4d5f753cfec22f3265b4e471c3e0eeb248704950
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://trafffe.ru/123?utm_term=borges+y+yo+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408346/normal_5fc17cd3cef69.pdfIn PDF document text
    • https://naxufubiromu.weebly.com/uploads/1/3/0/7/130738890/lulozepufirisun_pekodipib_lulajirir.pdfIn PDF document text
    • https://pusazaninad.weebly.com/uploads/1/3/4/3/134358808/futejilofofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374532/normal_5f94783749e4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387036/normal_5f9d4b131fc0b.pdfIn PDF document text
    • https://gebuluwit.weebly.com/uploads/1/3/4/7/134767861/1913563.pdfIn PDF document text
    • https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/5d87f34.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/website_templates_design_profile.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/kiss_dip_powder_nail_kit_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/femarabofisuxuwur.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/agrgation_informatique_maroc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb15d6bd-4345-4186-827e-d06d05dad3df/733190956.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/79699349335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffc103a2-f690-48a9-a41d-eaa05b6d3321/41408103892.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_off0000ddd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD4 5116 bytes
SHA-256: af1c9d57ee12c9d60b39f65dac8f0bcf035e7b3c8f5817894ccfa9b13928eaf5
font_01_sfnt_off0000ef62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF62 10600 bytes
SHA-256: a281d39ee6b5e91ef7a4eddfe2840b4c5fbca8b9abb7f92d478623df30c7a9f0

Open this report in the interactive analyzer, or submit your own file for analysis.