Malicious PDF — malware analysis report

Static analysis result for SHA-256 f645ca550af475aa…

MALICIOUS

PDF

75.4 KB Created: 2020-12-25 14:15:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f7e7a3e0842b9069034321ec907972be SHA-1: 72dfc26a25dbe7caaf83e27175947d5921b7edf0 SHA-256: f645ca550af475aa2f2490d1c17e23e7df2568f672e851314fd06e8641c25685
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs, such as 'https://trafffi.ru/strik?utm_term=warships+games+free+download', likely lead to malicious content or phishing pages. No scripts were extracted, but the PDF structure and numerous external links indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffi.ru/strik?utm_term=warships+games+free+download PDF link annotation
    • https://lexawuvake.weebly.com/uploads/1/3/4/6/134610488/motazeluxadow-zuresasan-dibip.pdfIn PDF document text
    • https://wazaxilam.weebly.com/uploads/1/3/4/7/134726650/pimatozunegiz.pdfIn PDF document text
    • https://nimijakis.weebly.com/uploads/1/3/4/5/134577625/6052356.pdfIn PDF document text
    • https://lizuvozirowamu.weebly.com/uploads/1/3/4/7/134719338/bodajasa.pdfIn PDF document text
    • https://viwezoluzuwa.weebly.com/uploads/1/3/4/4/134401695/7347871.pdfIn PDF document text
    • https://cdn.sqhk.co/nutakurij/pcibFih/rolling_sky_2_all_levels.pdfIn PDF document text
    • https://pimitasemoz.weebly.com/uploads/1/3/4/6/134646318/1171440.pdfIn PDF document text
    • https://doruxajowivabog.weebly.com/uploads/1/3/4/8/134870444/5601205.pdfIn PDF document text
    • https://dexetejitifite.weebly.com/uploads/1/3/4/5/134576896/d2216587.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/jorewalavol.pdfIn PDF document text
    • https://lewisenoj.weebly.com/uploads/1/3/0/9/130969481/4920591.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e21bea9f-1fca-44d1-9a4d-4972f68e0201/ginger_jar_lampshades.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/91607435299.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_off0000e734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE734 5560 bytes
SHA-256: 1afd230d26ed4aa316fb158d85d59899a0fb91d936840f7c93c5b96cfa546b71
font_01_sfnt_off0000fa0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0F 11564 bytes
SHA-256: 9931af254df637f5d9d90855d6f72a5955bef81c49318b086fd6e36321a75360

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