Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f5750c2bedf242…

MALICIOUS

PDF

96.2 KB Created: 2020-11-26 02:55:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b02131534e09c44b5c217471e8b24b9e SHA-1: 31caa1782e130ea0a2eed211f7e91028759423af SHA-256: d5f5750c2bedf242f5537577cacbbff0f009c618302d5fc38f5ea1aa1fc07071
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, flagged as a link farm, with one primary malicious URL identified. The ML classifier and ClamAV also strongly indicate maliciousness, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to facilitate the malicious activity.

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://trafffi.ru/strik?utm_term=the+abc+murders+penguin+active+reading+pdf PDF link annotation
    • https://mejefarekobuk.weebly.com/uploads/1/3/4/3/134338461/fagajunewepiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f8746b17fdbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5fb9566443810.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/2c32d1e7-f1c4-4e63-8a2f-319cbe86a0d8/does_google_finance_function_work_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/9010655155.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/dabarikunukopogud.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/bhavani_ips_full_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8a8e5f1-67c0-46df-b651-7e7c837caf5d/81704555685.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/32548814579.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/2095877967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c611bc2-b61c-4056-aa17-84209c152f44/24930167698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e50c25-75ba-40e0-8b97-d0b507bdf588/zerurip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53ebdee9-4569-4495-a724-7bf311f5b955/98185961113.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_off00013c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C79 5688 bytes
SHA-256: 5cdcb75a65cf8058559fdd5e646ea91e2114697f8fd967475971e962f766a8c3
font_01_sfnt_off00014fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FA6 10556 bytes
SHA-256: 916c615a413585e7ea3a4abde57f58e4d5051ef54949adfd9af1ddbc52a0dab3

Open this report in the interactive analyzer, or submit your own file for analysis.