Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee485427d9e4a5e…

MALICIOUS

PDF

73.4 KB Created: 2020-11-29 09:20:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0443ff5a5a58f658226d785d5e23fbb7 SHA-1: d665a95a032056f9b0220222882496fa279cc5b2 SHA-256: 5ee485427d9e4a5ec4845ebca29efdb0409ebf8aae772a37e652cefe8d3ac2bc
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, directing to various PDF files hosted on cloud storage and other platforms. One of the primary external links, https://trafficel.ru/strik?utm_term=tipo+de+normas+religiosas, is suspicious and likely leads to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

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://trafficel.ru/strik?utm_term=tipo+de+normas+religiosas PDF link annotation
    • https://ludodufapagita.weebly.com/uploads/1/3/4/6/134616483/xumadikim.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/sokilijaw.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/pazerogasarinu/zapakenu.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/12708727192.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/konuxemaluvodovibekozivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c12501c9-509d-4433-b2bb-e4463f9a1871/niduxanuraz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/449b51ae-7696-483b-8a2f-af4dfa4d16e8/88338257591.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/70357662240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a300f69-23ee-45e7-aff1-33ae1b24e54d/xinilujo.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/download_fnaf_world_on_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/icivics_taxation_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e708047-aaf8-4860-a989-3839eca6a9ef/risizirabotezi.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_off0000e1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C1 5228 bytes
SHA-256: 9e6c7684b0189cc314a739d5544929f340566fbe72ca550882a0cc884b77f916
font_01_sfnt_off0000f372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF372 11464 bytes
SHA-256: 60bd31a1035d425bba1dcdbc48ebba14433ea99749516171421d4838fba1d0f0

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