Malicious PDF — malware analysis report

Static analysis result for SHA-256 654340f5cfb4b7cc…

MALICIOUS

PDF

65.7 KB Created: 2021-01-03 18:34:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 44d46b1e3271d756d30ed5eaf9470c2f SHA-1: c18ae47293d39a54643cc586edef03c47f6d2f20 SHA-256: 654340f5cfb4b7ccdb867f79629378e2367b74015729282a8e2cac3f09e6bbb7
214 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. One of the embedded URLs, 'https://ggtraff.ru/123?utm_term=4+wheel+madness+hacked', is identified as a malicious redirector. The presence of numerous external links, including 'https://s3.amazonaws.com/jadere/84582796500.pdf', suggests an attempt to distribute or host malicious content. The ML classifier and ClamAV detection further support its malicious nature, indicating a phishing or malware distribution campaign.

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://ggtraff.ru/123?utm_term=4+wheel+madness+hacked In PDF document text
    • https://fefokepixax.weebly.com/uploads/1/3/1/4/131452923/e2abae3e26ad08a.pdfIn PDF document text
    • https://cdn.sqhk.co/vemonososepa/N7cjgBN/20922233358.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/S3EbVib/laxapirirevusipe.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/jdjf7DY/monster_hunter_rise_trailer.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/jadere/84582796500.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/android_app_security_testing_tools.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/mevejowemenabulan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be984947-9a08-4ad2-a042-935bdaa7ca19/rizilegom.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/integers_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/33579239339.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/lawaxonimefujimanow.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/barrows_brothers_rs3_guide.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_off0000c52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC52B 5232 bytes
SHA-256: e5b2e725ddc60693aaf55ce693ff99b01cf93b340b83460f1b7abde034c6b1bd
font_01_sfnt_off0000d6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E7 10248 bytes
SHA-256: ac802d86a2e302abeb8a8182d2b08f65a3678dc298db1f528a85e71336675df6

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