Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a70a2745aa1942…

MALICIOUS

PDF

75.3 KB Created: 2020-11-26 06:36:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5512dfe8386e56f04e27b9105aa999c SHA-1: 5cdb44afdb26971b640ea5b628d7419207a820ad SHA-256: 92a70a2745aa19423bbc9f6f2f87d31ce590439d322e23ac19349b8c460c2bb7
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 by the PDF_SEO_LINK_FARM heuristic, pointing to various domains, including 'traffset.ru'. ClamAV also detected this as Pdf.Phishing.Trojan. The presence of external links suggests an attempt to redirect the user to malicious content or phishing pages. No scripts were extracted, but the PDF structure and heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/strik?utm_term=sails+library+network+lakeville+ma
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f8782b198da5.pdf
    • https://zijixowopuza.weebly.com/uploads/1/3/4/5/134524639/7c66848.pdf
    • https://cdn-cms.f-static.net/uploads/4471249/normal_5fbc923900364.pdf
    • https://finolija.weebly.com/uploads/1/3/4/6/134625313/740073.pdf
    • https://roresino.weebly.com/uploads/1/3/4/3/134364893/69923.pdf
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lonevu.pdf
    • https://nimediwajukijiz.weebly.com/uploads/1/3/4/5/134501673/9216e75efb9e.pdf
    • https://fawugidizewok.weebly.com/uploads/1/3/4/0/134012544/2248361.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tulosa/drunken_sailor_accordion_sheet_music.pdf
    • https://uploads.strikinglycdn.com/files/03c0629f-a1c2-48cc-aace-c8bc8fadfdf8/fubafawit.pdf
    • https://s3.amazonaws.com/jevopemosod/44791824295.pdf
    • https://uploads.strikinglycdn.com/files/805a1c1e-8c7b-40c6-a024-933e103d4966/mr_white_and_mr_black_movie_download.pdf
    • https://uploads.strikinglycdn.com/files/490dbb3b-fa50-441d-8cc8-7d85cc485b0d/papas_freezeria_unblocked_cool_math_games.pdf
    • https://s3.amazonaws.com/befevifa/17663490994.pdf
    • https://s3.amazonaws.com/wovitiku/25663689806.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c86c.bin
f1eb46663fe1d948fca09b1767e4a5df61d3b732b06aa828373a5e2eb2e43f0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC86C 5392 bytes
font_01_sfnt_off0000dac9.bin
d5e7a765b97796b0175e809e28d882dabfc7cf2515f2c1d2366c5381a0085799		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC9 15472 bytes
font_02_sfnt_off00010afc.bin
18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFC 16144 bytes

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