Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a2a9c72a1cce033…

MALICIOUS

PDF

63.2 KB Created: 2020-11-23 20:09:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 010a1123388d064426c1e89c8790a2dc SHA-1: b0a5df57e21d202d38e70b306008d7072de70ce8 SHA-256: 6a2a9c72a1cce033c0b95aa34e2137c6dd775ba411750c443778f7969c3d1926
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with a primary redirector pointing to 'https://traffnew.ru/123?utm_term=chest+coffee+table+trunk'. This pattern, combined with ClamAV detection and ML classification, strongly suggests a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the links indicate an effort to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffnew.ru/123?utm_term=chest+coffee+table+trunk PDF link annotation
    • https://molusodufewi.weebly.com/uploads/1/3/4/4/134465793/9183579.pdfIn PDF document text
    • https://bopiwode.weebly.com/uploads/1/3/4/3/134367631/1814214.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/c4d32c89-a882-4479-9446-dc60ac5eebf9/53048614026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c89b3f-be5b-4855-946d-f43bd6b2de48/jesuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ee622d8-3278-47d7-b9b3-9961c215ed6b/bruce_leroy_last_dragon_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/biohazard_4_mobile_edition_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/097997ac-bb9b-42b0-b6d9-27ebdfe5ac22/pojozotesolajal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e01be77a-cd3e-4423-8cd2-4df3e64d50b4/sebizepatinobe.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/examples_of_mental_processes_psychology.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_off0000bcd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD9 5080 bytes
SHA-256: 3c0c92b96d84419ddc468b3ca4f2364d657dedd8eb37ce8c83cb001bb706af8b
font_01_sfnt_off0000ce17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE17 10124 bytes
SHA-256: 59bf004cfe259d3429f8aec0be22965f4c116ac6c1a7d470a15db3943915d1dd