Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ec7ad3d04d91bb…

MALICIOUS

PDF

82.3 KB Created: 2020-11-19 13:01:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c42559fcfc6d7664dedfb9e555cfe382 SHA-1: 1485fd199162a12a8ba917cd009f4f7262afc57c SHA-256: c3ec7ad3d04d91bb9441d0162cb4800b8f92f2814af83fae82b49178777547cb
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the presence of malicious links is sufficient to infer an attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=pathfinder+kobold+guide In PDF document text
    • https://mapazudisobamun.weebly.com/uploads/1/3/4/6/134604154/7804585.pdfIn PDF document text
    • https://xanibizodiwanid.weebly.com/uploads/1/3/4/6/134614549/gagajamivesuvep_lozopagam.pdfIn PDF document text
    • https://mupawume.weebly.com/uploads/1/3/4/3/134365579/kafawi_sobatilegivaso_gelolevifojuve_kovasomowapazo.pdfIn PDF document text
    • https://kewojifusufiw.weebly.com/uploads/1/3/4/6/134662328/6680376.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/naripa_fogolexezugekam_kasapoviv.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/gadumagabusodel/balancing_equations_practice_problems_worksheet_answers_key.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/viruses_bacteria_worksheet_answers_biology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85935369-f4bb-479f-9aef-b0c5f6e47ab5/18711635901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e93a7d77-b204-4864-ad3c-9e1b29deccd9/6137909202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b91d9f-c339-4632-b88a-b149f1c0346b/89995589513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b34f4c0-0b48-47d4-bf72-e83bcd44c4b1/91483514028.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_off00010824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10824 5196 bytes
SHA-256: 04e64077dcc3f9b2ecb9b9c014339c6b1810c1b85f8557d50143508a1554a5bd
font_01_sfnt_off000119cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CB 10196 bytes
SHA-256: e40f5776bb1cf45ee9b7337e761931485f4a1ca882fdc41ab8c59a11a2b4f678

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