Malicious PDF — malware analysis report

Static analysis result for SHA-256 946e7fb13755c63c…

MALICIOUS

PDF

69.8 KB Created: 2020-11-20 02:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f51ae37da6b6475c26f1caac93679845 SHA-1: ed28519b34a8aab2d3a82549c300a9236dfacb47 SHA-256: 946e7fb13755c63cb30248e787cf781cc370e5a7087c491d96bc6de90cb4bce9
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, including detections for malicious redirector links and a link farm. The document contains numerous external links, with at least one redirecting to known malicious infrastructure, indicating a phishing or scam attempt. No scripts were extracted, but the presence of multiple PDF links suggests an attempt to lead the user to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • 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://gettraff.ru/strik?utm_term=halloween+word+scramble+adults In PDF document text
    • https://jijalasigode.weebly.com/uploads/1/3/4/3/134344414/mijogimowoxakaw.pdfIn PDF document text
    • https://wulonuvesiga.weebly.com/uploads/1/3/4/3/134362584/wokilexetorifumux.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/xiriruvumojupax.pdfIn PDF document text
    • https://sonilotosoj.weebly.com/uploads/1/3/1/3/131379329/jigekuzileketed.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/ab3efaa.pdfIn PDF document text
    • https://gakexuguzadeza.weebly.com/uploads/1/3/4/4/134401700/todanoguxit.pdfIn PDF document text
    • https://jeretidaker.weebly.com/uploads/1/3/4/5/134595905/wupimipanu_wuniruloku.pdfIn PDF document text
    • https://daxuregivav.weebly.com/uploads/1/3/4/4/134431970/5522679.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/e144b271-b022-420f-baee-e18465358bbc/kusakabuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f12c6178-99b8-459c-843f-86852b1dea5f/tivex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a11804a6-f6da-4f2e-b179-bf74e1856f24/vumematudaxelix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32168898-4bf6-4fec-ab3e-47e53e3469c6/motivational_videos_for_success_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3e58aa5-ee74-416c-bcb0-12079ed36945/juke_manual_transmission.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_off0000d455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD455 5276 bytes
SHA-256: e2418581020b2b4899012f00e5b1b2bedb71e3c37339e3bf83b6fcb6f8dc24ef
font_01_sfnt_off0000e63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63A 10228 bytes
SHA-256: 62bfcf0de06d210d8fe0a3ed741298e3e6f0468e47e5a01ba53b665f7fceff70

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