Malicious PDF — malware analysis report

Static analysis result for SHA-256 05747eb3f959123f…

MALICIOUS

PDF

62.9 KB Created: 2020-11-11 22:58:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 66b16d0ebee20697170a73aded1b062a SHA-1: 0a3f49c0726cbc0512b2140c9df0666622fed52c SHA-256: 05747eb3f959123f627e3dd673ebaa96e220d8474f70a6f018bc027d0e0fb193
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or content distribution scheme.

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
  • 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://trafftec.ru/123?utm_term=amsco+chapter+12+apush+pdf PDF link annotation
    • https://kumusexowefas.weebly.com/uploads/1/3/2/7/132741352/fonarukutup.pdfIn PDF document text
    • https://jodotabamusunew.weebly.com/uploads/1/3/4/4/134402052/seveb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368949/normal_5f88904b8e434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374840/normal_5f95a792ee42b.pdfIn PDF document text
    • https://kegegizexuf.weebly.com/uploads/1/3/4/0/134042356/8181827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_5fa83e3085bb1.pdfIn PDF document text
    • https://popilezofale.weebly.com/uploads/1/3/1/1/131164236/wogajag.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/444c42e7-e4dc-44fe-b176-8f5f57b68739/10331679187.pdfIn PDF document text
    • https://s3.amazonaws.com/muvunekagok/90908605200.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/data_analytics_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/bmw_x5_e70_fuse_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/44740717152.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_off0000b881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB881 5536 bytes
SHA-256: 6c8bd7162fced429bf12c461efe45b47ce3b4b5ba57fbcd17249b5f81981ba97
font_01_sfnt_off0000cb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB30 10516 bytes
SHA-256: f0a275d229b9293ab68b020d64aa6a8441a82c7d8c4cf79ebf77cb75d2d42d15

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