Malicious PDF — malware analysis report

Static analysis result for SHA-256 e543df6d48cf6069…

MALICIOUS

PDF

67.7 KB Created: 2020-11-23 22:52:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cb8b37d4a147e4a85d3586d79c7158fb SHA-1: 2a2e01a9f83ebc6423261e66a38dcf3783f4f5af SHA-256: e543df6d48cf60690a39b37ddd37366afb8e801697b7d1a0b20dbc7ce1ce26cd
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many of which point to known malicious redirectors or disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?utm_term=furby+value+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420756/normal_5fa68829d5d85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382949/normal_5fa6221781fbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5f890cef8e408.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/4043245.pdfIn PDF document text
    • https://jevixivuxed.weebly.com/uploads/1/3/4/6/134622771/jafenufobolupedam.pdfIn PDF document text
    • https://pasosawa.weebly.com/uploads/1/3/4/7/134737133/1a6bdb2e3.pdfIn PDF document text
    • https://zepaxanodufinek.weebly.com/uploads/1/3/4/4/134455649/9630f1f5ced.pdfIn PDF document text
    • https://jawogebewo.weebly.com/uploads/1/3/4/3/134369376/a5353cffff2d.pdfIn PDF document text
    • https://pesulomerusetus.weebly.com/uploads/1/3/4/1/134109359/0dde9a0f7ef9.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/910fbe39522d4c0.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/0b8926af-ad3e-444f-bf99-49c4f5b693b4/reseke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0767307a-6cc3-4a33-9306-ab16456bba60/poeme_d_amour_victor_hugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/379680b3-4087-423b-8c5f-06e138094990/76457686096.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/78612951945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fddde9dc-3e34-48e5-a3f4-ef233a7c6afb/mamip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c12c1aa-8b6c-49be-8ef4-9e6e73e0b89d/population_distribution_definition_biology.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_off0000cb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB79 5072 bytes
SHA-256: 534879aa6e24dce8ca4d3ec59a529612ec055798ac59fad64f5fa48087d48f99
font_01_sfnt_off0000dcd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD7 10992 bytes
SHA-256: 3d6b172b9959aeb33bf1c9bf1dde3c8fdad5f5381e778c62183ff2a412d54bb6

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