Malicious PDF — malware analysis report

Static analysis result for SHA-256 3695dffb39a4963d…

MALICIOUS

PDF

93.1 KB Created: 2021-02-16 11:54:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6f340d9849f9ffc186cd344fc5f9d361 SHA-1: 1ede93c3711686494b0691eac4568a92f337b962 SHA-256: 3695dffb39a4963d36e412b62dbcaa16fac17563678dc3d5da3065fa2abeb61d
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://crophysi.ru/wix?keyword=vw+beetle+1600+workshop+manual+free+download PDF link annotation
    • https://cdn.sqhk.co/sutadejuna/gVrtS6H/fokovijuvomeb.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/iiaiajb/7075390810.pdfIn PDF document text
    • http://theandyhong.com/balearia_palma_formenteraz4ni2.pdfIn PDF document text
    • https://pebujekug.weebly.com/uploads/1/3/4/3/134380671/sitekinumex-winupagivo.pdfIn PDF document text
    • http://ranking-se.com/game_gangstar_2018trals.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422386/normal_5ffe8e57cce85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374848/normal_5ff4c2a354278.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417805/normal_5fc9cc6ae3eae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420767/normal_5fde60a82d024.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/4heQhgN/10397444393.pdfIn PDF document text
    • http://cmbmarketing.agency/53995885647ic2du.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369503/normal_602a114c4f943.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446394/normal_5fd05a078a01b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472760/normal_600c0e6c30e86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482629/normal_5ff16cf031cfd.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/pavujiniz/best_performing_managed_investment_funds_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/rakupebonituzuvefepigiren.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_off00012f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F15 5888 bytes
SHA-256: 1ca3149da7b537a06c8ccb13bd3ec477ed7c95bd240baaa32a1b0ef57db22241
font_01_sfnt_off00014310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14310 10428 bytes
SHA-256: 13269d6dc6ed26b66233ed805b06501cc8861c26f4c21d9cbcadcd455c9262d4

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