Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb23e9361410b1a…

MALICIOUS

PDF

64.8 KB Created: 2021-01-01 11:51:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8a84e5325c106f0a25668abc261d6442 SHA-1: c18d52abb5b24f9b3ab8fe8e9812079d81e47047 SHA-256: deb23e9361410b1a9cec27eefff4d334aace08cc9a15227290ff66a546552b1b
156 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/strik?utm_term=pac%2540+gov+dental+claims PDF link annotation
    • https://cdn.sqhk.co/jarutejip/JicDifD/flipper_anderson_giants_game.pdfIn PDF document text
    • https://cdn.sqhk.co/zesunotu/hbibDib/37319856268.pdfIn PDF document text
    • https://cdn.sqhk.co/walumupo/jhZibmW/32874829715.pdfIn PDF document text
    • https://cdn.sqhk.co/gajerivab/hiPfij0/soccer_penalty_kick_distance_from_goal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_5fd9124de315c.pdfIn PDF document text
    • https://wegotutitupal.weebly.com/uploads/1/3/1/4/131453182/bodusojobi.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzekofuwe/zjhFJKD/96325557885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443326/normal_5fac3c3db1dc3.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/2632672.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421613/normal_5fd9e579a84fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5fabf8a0bab91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5fe92c0cb514b.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/646d1e05-3852-43b0-b7cd-aa90ef0222d5/womens_swim_shirt_loose_fit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3801ff8f-7dae-40b1-9a66-dfa47f0a83ea/norton_field_guide_to_writing_2nd_edition.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_off0000bef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF4 5556 bytes
SHA-256: 84ba95f381230dc0e49042390ad76ebe37df59342c8db7c673890a8fc2966869
font_01_sfnt_off0000d1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D9 10608 bytes
SHA-256: 01ce5cc2d2fd4297be5e79f361148f0a4670e939b0f27fecd4393e1bdf052202

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