Malicious PDF — malware analysis report

Static analysis result for SHA-256 093c706868dd2cc7…

MALICIOUS

PDF

78.9 KB Created: 2020-12-31 05:53:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 88e44effe35da252c425208b493e2c1a SHA-1: 8847cd678fc47427581b3a5d4f3146ccc60dc120 SHA-256: 093c706868dd2cc72c66cad6c6cd3a85ec864547a16776ee2a3091186de2df76
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically a phishing or trojan threat. While no scripts were directly extracted, the presence of numerous external links, including one to 'trafffi.ru', points towards an attempt to redirect the user to a malicious site for further exploitation or credential harvesting.

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
  • 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://trafffi.ru/123?utm_term=kiss+memorabilia+price+guide PDF link annotation
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/legefilezipelufis.pdfIn PDF document text
    • https://sivisobimiji.weebly.com/uploads/1/3/4/7/134754783/813c245.pdfIn PDF document text
    • https://sasikeruxet.weebly.com/uploads/1/3/4/8/134851076/wosowawuriziwi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487208/normal_5fe2b32848957.pdfIn PDF document text
    • https://luvupomadimudux.weebly.com/uploads/1/3/4/3/134350134/tanagofasiwivuxe.pdfIn PDF document text
    • https://dopubitiru.weebly.com/uploads/1/3/0/7/130776304/xifoxore_jebamiluwopep_vaxavugejegapo.pdfIn PDF document text
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/e5d4abcf36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449605/normal_5fbe52512d58c.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/xesigeze/levinokev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c7a50f0-ca9b-4e1a-8d9b-09d54d7bc397/68981208385.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/gritty_meme_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ed08f3-0f53-4f4f-8720-a0cbb9a7a43b/74738646908.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/kigisolagin.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/oceans_rend_collective_chords.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF868 5504 bytes
SHA-256: 195d835f473b0316d6629672e27c6cf2f2bf629c627b3ba9eae7834f53d5f62a
font_01_sfnt_off00010aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFF 10416 bytes
SHA-256: 6e2a1c351c771cf58c23637efaf8d89c92f8a917d8090f3900272a179b6a04e4

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