Malicious PDF — malware analysis report

Static analysis result for SHA-256 222f8c492edd07ff…

MALICIOUS

PDF

69.7 KB Created: 2021-01-05 02:02:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 23493779774d49e97994c0503b9c29f6 SHA-1: a7375642d2cea4c3099e4c6a2e95c92a16644519 SHA-256: 222f8c492edd07ff0f6c9500a5983c22821bbd4c06e60206a1bd2dac0f8d1a55
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/aws?utm_term=antivirus+for+pc++offline PDF link annotation
    • https://cdn.sqhk.co/kezavilageg/jahdSjd/42152233601.pdfIn PDF document text
    • https://manasuxejorodi.weebly.com/uploads/1/3/1/6/131606962/4218636.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418166/normal_5ff3a4d23799a.pdfIn PDF document text
    • https://sasogobol.weebly.com/uploads/1/3/4/3/134387633/gasodewuwuw_vewaruwejes_biwusepawuwolek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377662/normal_5fcdc9f03bd9d.pdfIn PDF document text
    • https://cdn.sqhk.co/melukate/upHhjh3/tapopoxoxokofaxu.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/bc8c9119-8227-4c85-8b90-3ca27ff7fef9/23205730128.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/maytag_performa_side_by_side_refrigerator_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84c84db6-5bcd-46f1-b02f-9d595fe2f22c/3dlut_mobile_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd2db104-7627-4726-9455-b8a68c765e56/identify_the_false_statement_regarding_bond_energy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/834046f9-65e4-4405-95df-88bc87a9e5c0/gujogut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fca8a10a-9a4a-4335-9a68-314813159c55/xebunelevod.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_off0000d6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AE 4848 bytes
SHA-256: 9bd9114b0a32fc5fc8eea8436ed435c55eb3a57905bf7322089b1e09956e211c
font_01_sfnt_off0000e74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74A 10204 bytes
SHA-256: cd39d4c736ff297273242c82a62a125540c30b99cd2dbb1e7ecae30023b69cda

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