Malicious PDF — malware analysis report

Static analysis result for SHA-256 74be1a99e70ed72a…

MALICIOUS

PDF

84.4 KB Created: 2020-12-20 10:29:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b245a70e0504b7c1ca72be6723c56a3f SHA-1: d78396d7f84252c18d081fdc7ed0567e64f41699 SHA-256: 74be1a99e70ed72a488d9e1f130e71dcad7d9f0bfbce9e138128466d9f3e13ec
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 0.9997

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://trafftec.ru/strik?utm_term=solvent+polarity+index+uses PDF link annotation
    • https://sobegivi.weebly.com/uploads/1/3/4/3/134311910/9d88f72.pdfIn PDF document text
    • https://lewagezu.weebly.com/uploads/1/3/4/3/134369469/nijomifazisome.pdfIn PDF document text
    • https://sawepaxir.weebly.com/uploads/1/3/1/8/131858353/d0d0d4e.pdfIn PDF document text
    • https://jijoromosuw.weebly.com/uploads/1/3/4/7/134714512/a2287f6.pdfIn PDF document text
    • https://rinajota.weebly.com/uploads/1/3/4/7/134714435/2c6c52.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zurovajij/78336877791.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/47799753788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e8b7c57-f58f-4f74-8c6c-e9c919e9e203/vidcon_pro_mod_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36ab7a879396864183595/t/5fca5456d9b89011df93bd96/1607095384121/wewopuk.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/android_chronometer_format_seconds.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4cbf4e98326c0206e350/1606372544363/ponotalevajedujir.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/85301085733.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/polakawiko.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF872 5168 bytes
SHA-256: bc51b2e3b155e9096230fc867557f40f0e49839a524226c51b42a329a9ceac19
font_01_sfnt_off00010a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A10 13668 bytes
SHA-256: ad25095478070afbb9ecd6bad16e0f0e89fb046ec44c6d6e4ff34e53504e2b3b
font_02_sfnt_off00013566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13566 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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