Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ba420e778b44d1…

MALICIOUS

PDF

63.9 KB Created: 2020-11-19 09:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0e44d333dc3f31fb57af6864b188aca6 SHA-1: 91015ffc31ab41c57efc6b0350b87e8845e9e090 SHA-256: 09ba420e778b44d19c832c985f485877989430130164000947aa4181b80f6cf9
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://traffking.ru/123?utm_term=roblox+troll+ideas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388282/normal_5fa768cca9593.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f88122667c6d.pdfIn PDF document text
    • https://fozaxebefi.weebly.com/uploads/1/3/4/5/134584315/jenarunixob-ruwepoko-wawugufe.pdfIn PDF document text
    • https://garisufusomepis.weebly.com/uploads/1/3/0/7/130740000/a0850369d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412377/normal_5fa61a37e12c7.pdfIn PDF document text
    • https://kifelulamexeb.weebly.com/uploads/1/3/4/3/134310841/799f90bc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380082/normal_5f9ad93b259fc.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/midaguvimabof/math_in_focus_grade_5_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c8ba3fb-526a-4338-8542-55e896b20c52/wujelibimixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/908891e5-c355-4b56-8678-74865797bad3/best_feats_for_a_warlock_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/71299857573.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/icy_veins_mage_lvl_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/ciencia_y_tecnologia_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/azure_devops_documentation.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_off0000c09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC09D 5032 bytes
SHA-256: 7d9ced4ae863b6612c49d8320b64c36783e7ad8367a52df99d6586754e4a0ce7
font_01_sfnt_off0000d1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CA 9828 bytes
SHA-256: 7f43a87e41301741184a7c3452248f526b21a6ee0e1e8c5e0c4bc526b243e1b6

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