Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcfc9d425cc73486…

MALICIOUS

PDF

71.5 KB Created: 2020-12-22 19:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e1ee35d9ede9904fd628d89f9224955e SHA-1: 07a8037c9aead673393a785ca7d41b3767407ffb SHA-256: dcfc9d425cc7348644ead037eec3e0c2ad38ba749028331d65f69d05a7ffa6dc
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffmen.ru/aws?utm_term=powerdirector+pro+apk+free++for+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4467571/normal_5fdc075315e18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420761/normal_5fd8b64468b5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_5fd7ddeb24c8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_5fa1f20e52ef4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5fb60f9e85b5b.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/nigimul/adobe_air_version_1._0_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a331c7fc-48dd-4769-84d2-efc9e5ddceda/zurabomizudukoger.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc67dbeab79f442f24ffb7f/t/5fc9f69885627875175f296f/1607071385133/pinball_wizard_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/already_just_yet_exercise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d940cc0b-1342-4648-9c5e-f06a5da98026/dragon_slayer_guide_osrs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4714fded-1637-4de2-9d00-14320d0b380b/47872782683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98afd208-6e75-4f21-bd4a-f18739beb30b/zasusoromenokitobebax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ee9155d-a0fb-4f0f-bc2d-134cb4c24c95/vifatibonuxorulisijus.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/61641697272.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_off0000db29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB29 5096 bytes
SHA-256: 3c60e51cec7f4152c19cb2e56b6cad2516b3fd6ee63d69f850203fcb503c275c
font_01_sfnt_off0000eca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA4 10828 bytes
SHA-256: 3936f5fc7bc71ff213cbc98657c2f683a896a7cad98a7eeab9617ff2953dfc63

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