Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2646e31687addcb…

MALICIOUS

PDF

81.3 KB Created: 2020-12-26 23:43:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bc2c1d74afa18b89036791241e6e62c3 SHA-1: 95c35bdf4ce1119789bb457941145468283ac277 SHA-256: d2646e31687addcb6ef4b193e22803eda86e15461e318f08ac3fa70ec025582a
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded links suggest an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/strik?utm_term=call+blocker+for+landline+canada In PDF document text
    • https://tojuxumisadef.weebly.com/uploads/1/3/4/7/134714483/8983973.pdfIn PDF document text
    • https://fisikovomit.weebly.com/uploads/1/3/4/6/134652659/07197a519fd0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a1a6e3b-a7eb-43b9-b4c5-ab78dfa2a4fc/93095120927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/782598b5-0de0-4cbc-a73c-13db64a138c8/mount_desert_island_high_school_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30cf382d-a1bd-4a19-aeed-103c72a3dd41/documentum_tutorial_point.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/975a4bea-1d03-4537-af60-959d372c96d5/73652043246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45e2248f-6a9f-4ded-a780-52ea2436627f/minion_rush_hack_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a422323-744d-4d9c-bf08-ec1130758d8d/skechers_careers_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9da0c106-ce9b-43eb-bc12-0d677878f0b2/76980448650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f791f9-f904-462c-a713-0f1bedcf471b/18625277243.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_off0001025e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025E 4944 bytes
SHA-256: 69ea0f50279c2f1dca1e22a360b4e47278b912856efc3c54417c13ecde1e08db
font_01_sfnt_off00011338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11338 11240 bytes
SHA-256: 0fb8c3859daf9784facbf3e8b1343745b594201d6d3bb02cae0ea6e156057ae7

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