Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e9b11e8243b715…

MALICIOUS

PDF

80.5 KB Created: 2021-01-05 19:59:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 541b8ad02a6b438227f8d3c7ad7e1ead SHA-1: 9d058f2a21ae09e6e088c9c7e7420df76a1e7c68 SHA-256: 67e9b11e8243b71542b969d692e7048554d8ce276a71b2ff98a2cf01daba8fed
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file is identified as malicious by ML classifiers and ClamAV, and contains a large number of external links, suggesting a link farm or SEO manipulation tactic. One of the primary URLs points to trafftec.ru, which is likely part of the malicious infrastructure. The document's content is presented as a service manual to deceive users.

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/aws?utm_term=hotpoint+aqualtis+washing+machine+service+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446388/normal_5fe317f5af70f.pdfIn PDF document text
    • https://vozekokojexofu.weebly.com/uploads/1/3/4/6/134645554/8460362.pdfIn PDF document text
    • https://wexejapu.weebly.com/uploads/1/3/1/3/131384175/nufagu-ditiwaluriruv.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/RhbCihM/lego_duplo_town_world_animals.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/9cea3646.pdfIn PDF document text
    • https://winimotewo.weebly.com/uploads/1/3/4/5/134593518/bulirokitoweju.pdfIn PDF document text
    • https://pusasosabuni.weebly.com/uploads/1/3/4/6/134654602/4100aa22ea18d9c.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/lolaritemukole/writing_a_letter_in_french_formal.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/32804050355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c172f0f-4249-45f2-b170-bc7a1e0079fa/96121975662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d2a375-8880-418e-b4e9-200e5f19f53f/denamarin_for_large_dogs_costco.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/29577535758.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/80402053088.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE759 5588 bytes
SHA-256: 0edf6a2860551646b60cb162e0077a46e6df28a0390677c3ddbf881ec7d212e4
font_01_sfnt_off0000fa47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA47 10728 bytes
SHA-256: 9024f42d28ec0347517ff732643b6217fcf98d29ccca5bb62b6dcdf92be32488
font_02_sfnt_off00011ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE5 16148 bytes
SHA-256: dbe1f6873dfbc63a557840fa26764ed1e24daf10180a919a5f50e881975b6f06

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