Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30fc2936b42a220…

MALICIOUS

PDF

64.8 KB Created: 2020-11-11 21:43:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c5d5af5b6164bf80e59343cef1942bea SHA-1: a0872e43c5e319f55e39b73d86bbab021148fa31 SHA-256: d30fc2936b42a220ba63c795fc516a7d4e91318234e6254251ed866e49d1fac1
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 identified as a malicious redirector. The ClamAV detection and ML classifier also indicate maliciousness. The presence of numerous links suggests an attempt to direct users to malicious sites for phishing or to download further payloads, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/aws?utm_term=castor+informatique+france+2015 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413362/normal_5fa39ab98894e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f8d0bc7e87ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5f945b4b211ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369633/normal_5f90ff92d7d72.pdfIn PDF document text
    • https://mawepalutolura.weebly.com/uploads/1/3/4/0/134040672/megozapes.pdfIn PDF document text
    • https://sixexarujizevav.weebly.com/uploads/1/3/4/5/134584368/8866122.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384470/normal_5fa0223d2538d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471083/normal_5faa5d80be75c.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/4280872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389599/normal_5f9a10885575b.pdfIn PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/xewijirosopoxu-xatuwal-dusedubaxosew-dopawid.pdfIn PDF document text
    • https://besavikeneg.weebly.com/uploads/1/3/2/8/132815808/c8d70d8a371a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405179/normal_5f92ab6d8b4cd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000be44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE44 5476 bytes
SHA-256: 30d65327bf23a94f35dc1a4e80aae3ee2b645b9e61c18d702804512033e5ec5f
font_01_sfnt_off0000d0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DA 11332 bytes
SHA-256: 95ea391b33f94778f3b4f76a21947797a5d1a19f6fcf068ce274e0f18be8e84a

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