Malicious PDF — malware analysis report

Static analysis result for SHA-256 799a7ff881ffa62d…

MALICIOUS

PDF

70.1 KB Created: 2020-12-20 04:27:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8a9fb8fb3e40b92ac144deeb46fed9e5 SHA-1: 18a8bd2e3b20f67c8f820fa7a497978a7063d735 SHA-256: 799a7ff881ffa62df5c72ed779038dbdb12338ac9ed403ba732d96c3fd4779c4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one identified as a potential phishing or malware distribution URL. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to a 'parking pass refund', aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/strik?utm_term=ucf+parking+pass+refund PDF link annotation
    • https://bididanigatozum.weebly.com/uploads/1/3/4/3/134314142/1493925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426269/normal_5f9f107f87201.pdfIn PDF document text
    • https://gokivasinu.weebly.com/uploads/1/3/4/3/134334496/gowamujukoled.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402246/normal_5f9af11a4de47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402520/normal_5fa89e693e67c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f8980d1b0f7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_5f8a182236105.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462992/normal_5fdea820c4230.pdfIn PDF document text
    • https://ziresaro.weebly.com/uploads/1/3/4/5/134509830/lesaxeludozovevo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fceb98df527e820f03c15a0/t/5fd6300f102ca46975dc7e9c/1607872528154/dabiz.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/employee_retention_project_report_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/fuxogavurafebisalapun.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E1 5040 bytes
SHA-256: 881013f909934d8f8f34a6a7903213c68e131c09bc08ca727854aa6e03381ce0
font_01_sfnt_off0000da0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0C 10380 bytes
SHA-256: 28be98a8669a59a23932105c42b63407367259c2ac085e4a6b1ca7408d4e3ea7
font_02_sfnt_off0000fdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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