Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee68ec723ae8226…

MALICIOUS

PDF

70.9 KB Created: 2020-12-01 14:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21308dbf5ff021b89facdf888af28967 SHA-1: 372a9efc3be0254bd63e41c1bc37f66473ad0674 SHA-256: bee68ec723ae82266b5730208a1e357c838351c55860e9ccbf1af40442fad933
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://trafficel.ru/strik?utm_term=san+jose+state+university+business+transfer+requirements', suggests a potential phishing or scam attempt disguised as legitimate information. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or distributing further malware via the linked PDFs.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?utm_term=san+jose+state+university+business+transfer+requirements
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/mamex_fopemajojuxed.pdf
    • https://cdn-cms.f-static.net/uploads/4413735/normal_5fa1b07e0bf9d.pdf
    • https://vogoworelo.weebly.com/uploads/1/3/4/2/134266182/vaveno_pujowisevaful.pdf
    • https://fifubinagate.weebly.com/uploads/1/3/4/8/134854053/bukazo.pdf
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5fa4e1d925b95.pdf
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5f936cd88024a.pdf
    • https://mivegogoke.weebly.com/uploads/1/3/4/3/134365655/7831229.pdf
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/metor.pdf
    • https://cdn-cms.f-static.net/uploads/4411935/normal_5faada3da77f5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdee0d173fb5383b66ebba/1606282765397/dugowemosemelexosesipul.pdf
    • https://uploads.strikinglycdn.com/files/998cfaf3-d8fb-453e-9c77-f4a8ab529276/56912627796.pdf
    • https://s3.amazonaws.com/jipowumat/bagonisuguwupupizerobup.pdf
    • https://uploads.strikinglycdn.com/files/da4a1ed6-6b64-440a-ad74-6333d6b033e0/323867871.pdf
    • https://uploads.strikinglycdn.com/files/8c435088-e663-4e8d-bdb5-2a602ca040cc/14216345597.pdf
    • https://uploads.strikinglycdn.com/files/aa8aa223-a0bd-4f0d-b47c-5364f31a3ca3/7901662508.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_off0000d5d8.bin
79ab342aad836d77aa77867c0f77bbac06f5d5087c18f136c543e09ccc6f44df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D8 5488 bytes
font_01_sfnt_off0000e886.bin
6cd083f4dd2524990d45a14dfb9520ab2485fd65c594acc8ab20aee2f2b8e01f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE886 10628 bytes

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