Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d1c2c0df27b98c8…

MALICIOUS

PDF

76.2 KB Created: 2021-03-19 04:59:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d81836ceb37140a9180dc48f6d9ddf3f SHA-1: d203e527dcf80bc8a37e8fa9fb8f4262e5ccda9d SHA-256: 6d1c2c0df27b98c8898ff77a9fdfd38218521da84520bd94588cdf3b0d523dd9
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://midufefew.ru/aws?utm_term=troy+bilt+pony+riding+mower+steering+parts PDF link annotation
    • https://cdn.sqhk.co/gepeduvo/hgd0ifD/scenario_manager_excel_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/cpCIFvc/rilen.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/gigVihU/23208852442.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446773/normal_5fde57918c08f.pdfIn PDF document text
    • https://cdn.sqhk.co/poxirowo/hvEO5UW/spanish_word_of_the_day_believing_meme.pdfIn PDF document text
    • https://cdn.sqhk.co/bozadukopufu/ahbjgcj/30049111706.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369506/normal_5ff402278f2eb.pdfIn PDF document text
    • https://cdn.sqhk.co/wapuvalapowa/ZLVuege/65392727974.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374177/normal_5fec752b2e559.pdfIn PDF document text
    • https://cdn.sqhk.co/tunixomaj/4ggDCa8/27333009417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368991/normal_6020ff1ae6ba7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482218/normal_5ff8903525e45.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/banula/19699830033.pdfIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_499b4b933f34478689395795a10b5d85.pdf?index=trueIn PDF document text
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_fda12bc89a334943b304219fe0072e1e.pdf?index=trueIn PDF document text
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_74fd7ff2c4e34089a03b4397d6d74639.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/coeliac_diet_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/jeruxuvezuvomodaxanubud.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_off0000ea2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2F 5560 bytes
SHA-256: 75b4435bbcac6f725121850ae2ec404442edc07af2e78675d85577371d019b42
font_01_sfnt_off0000fd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD12 11288 bytes
SHA-256: c10e466c11d584842e47e13f97d40e87a2801fd9fc7a27625432ce932e05a417

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