Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f38246dc404ffb…

MALICIOUS

PDF

65.9 KB Created: 2020-12-20 04:58:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 496f7ac2218cb82156b6ba70efbf5d33 SHA-1: 7b7b6e90a66d044835fa1ad16e03abd869913c63 SHA-256: d4f38246dc404ffbd01f12587ab19d8ca4eb9e71b2ecf0caa273889c798bb5dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which are to other PDFs, suggesting a link farm or SEO manipulation tactic. One of the primary external URIs points to 'trafficel.ru', which is likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafficel.ru/aws?utm_term=movie+soundtrack+sheet+music+pdf PDF link annotation
    • https://piwutevuxave.weebly.com/uploads/1/3/4/8/134891910/pomilelufozanefef.pdfIn PDF document text
    • https://lisiladojorinin.weebly.com/uploads/1/3/0/8/130874519/fe571c.pdfIn PDF document text
    • https://gewewipuno.weebly.com/uploads/1/3/0/7/130775766/65299a68.pdfIn PDF document text
    • https://dejalujufoleto.weebly.com/uploads/1/3/1/3/131378776/1016497.pdfIn PDF document text
    • https://susakatevasek.weebly.com/uploads/1/3/4/8/134871092/8019013.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0f975bf71053ccb109642/t/5fc20ebb145a8629dcf7bfe8/1606553278430/gifixevumetademuromali.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e9eb3398ff75152e2002/t/5fc3c3cbf3de5e49b5d73e7b/1606665168332/57877856227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/880d76a5-4b3a-42d1-89fc-2f2c4ed4621f/aafes_pog_collectors_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1583bff13940aa242bd98/t/5fcc346c3ff1011540e34e39/1607218285331/stachu_jones_caly_film_po_polsku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87fc9e59-6b63-4c33-bf19-eae00df87919/97291014865.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_off0000c4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E5 5492 bytes
SHA-256: 71ada08e0eca37be2517e821ca8bc9c02fe0d61a6c5f35349be0db5e5fc07bdd
font_01_sfnt_off0000d77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77C 10424 bytes
SHA-256: 3dde144069a79297ce17c2bbc55bc0c180c60c93ca9062e5b36beb7191a85670

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