Malicious PDF — malware analysis report

Static analysis result for SHA-256 e939adef18d31789…

MALICIOUS

PDF

65.0 KB Created: 2020-11-10 12:32:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65c78f4d271eb3913f7f43235f35c956 SHA-1: 52d5ddd3e0e5ca1253ae7e0c30728af8029060e2 SHA-256: e939adef18d31789cafa1af01e72ffec83279014e98344595d0020f9dee3805c
156 Risk Score

Malware Insights

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

The PDF contains embedded URLs and a document body that includes keywords like 'watch online free the film darkest hour', suggesting a lure for users. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, with one pointing to 'traffking.ru', which is suspicious. ClamAV also detected this as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/123?keyword=watch+online+free+the+film+darkest+hour
    • https://jivetigaforivuj.weebly.com/uploads/1/3/4/3/134350389/e1a14b01ba.pdf
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/mijiku.pdf
    • https://vunatoja.weebly.com/uploads/1/3/0/7/130738644/94e71.pdf
    • https://duvonejubuzal.weebly.com/uploads/1/3/4/3/134321315/2d2c939b78.pdf
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/bc903b28.pdf
    • https://wuwotozon.weebly.com/uploads/1/3/4/3/134315251/68645dbf.pdf
    • https://vifixizunegivu.weebly.com/uploads/1/3/4/3/134349865/5955026.pdf
    • https://dejesiviwusa.weebly.com/uploads/1/3/4/6/134688897/vorotigupokezawi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/465c31a5-7f93-4fab-9cd4-61da084d938a/applebees_pay_stubs.pdf
    • https://uploads.strikinglycdn.com/files/9ffbd3ab-8fe5-44c9-b0ab-04d1127626f7/gorofepanafiwakoxu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c12e.bin
1ce1216c2a15eae526fcaadfb9c29e960b9c73bd6a393ba18177b23a2a0c43c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC12E 5340 bytes
font_01_sfnt_off0000d336.bin
2a395820858fd2cd693c78338566789c39b610a064cff1f91f00a11c200424d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD336 10632 bytes

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