Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f03430300eb6b71…

MALICIOUS

PDF

85.4 KB Created: 2020-11-24 20:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5178c65a8b2fa1db3b16c5eaab277639 SHA-1: 139117f64869f7be98133c95535fdc455f84caf7 SHA-256: 2f03430300eb6b710d6eecb531e89e985483bbcca72de575ba01d777b5e13b81
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least two identified as redirecting to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a deliberate attempt to create a link farm pointing to potentially harmful content. The ML classifier and ClamAV detection further support the malicious nature of this file, likely used as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/strik?utm_term=aa+number+after+trillion
    • https://xibedawik.weebly.com/uploads/1/3/4/5/134584063/jewogugu.pdf
    • https://waxojokizubow.weebly.com/uploads/1/3/4/4/134482073/dimatodiponajaw.pdf
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/pevatupesa_faxurorelotarom_segemevixuvaxe_sudefigi.pdf
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/5bcf22648fa66dc.pdf
    • https://cdn-cms.f-static.net/uploads/4369774/normal_5fb5966805e2a.pdf
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f8bd8095ad29.pdf
    • https://cdn-cms.f-static.net/uploads/4480142/normal_5fa8fdf0a4863.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/34937381-b834-4dc0-93b6-b2fca7e247a7/merupisaluwuxilazefi.pdf
    • https://uploads.strikinglycdn.com/files/0c51eef0-376d-45fc-8482-26707a1f5715/deganepanoxizonikewut.pdf
    • https://uploads.strikinglycdn.com/files/c865d8d2-713d-4f4f-8600-2712bac2c37f/29445810629.pdf
    • https://uploads.strikinglycdn.com/files/f75ada7a-44c1-46c4-b141-ae3a67575cc1/jikori.pdf
    • https://uploads.strikinglycdn.com/files/8b3cc731-d6c5-4a1f-b332-bae7c33408cc/wilumabupilowavepedarili.pdf
    • https://uploads.strikinglycdn.com/files/b62673e2-847f-4833-bef2-27fd0fa40cba/tudotikapijupop.pdf
    • https://uploads.strikinglycdn.com/files/4ead4f62-46a3-4689-a702-3b013007346e/python_image_viewer_qt.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_off00010ee3.bin
a43909f030e5644881237f7ca3cab570caed44b777ec51aad2f2c1b3be6b2cf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE3 4864 bytes
font_01_sfnt_off00011f5c.bin
0f0e323514d75c1dba3f43d7475a9854502d7f605c4954c25d5828cd5d91f5d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5C 12620 bytes

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