Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3a186c4829c49c…

MALICIOUS

PDF

77.5 KB Created: 2020-12-17 22:55:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: aad57c98acd2f653f823371ffad386e6 SHA-1: 9e8a3c33525a44e907a8ebf469a34ad6c61ae0fa SHA-256: 7f3a186c4829c49cee2539f4a543ad550a369fa1502256bc1131aad0ade5df4e
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'Yellow pages marshalltown iowa', aiming to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://trafffi.ru/123?utm_term=yellow+pages+marshalltown+iowa PDF link annotation
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/ninifezun.pdfIn PDF document text
    • https://vujanakisa.weebly.com/uploads/1/3/4/4/134401771/1add9f5a3afc6.pdfIn PDF document text
    • https://xovazarorofo.weebly.com/uploads/1/3/4/4/134457653/f8d791d32a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483864/normal_5fb330cee241e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_5f8eb9c46980f.pdfIn PDF document text
    • https://vuvonuzomuvi.weebly.com/uploads/1/3/4/5/134508102/zutona.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/state_of_georgia_paternity_acknowledgement_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/annual_budget_excel_spreadsheet_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3205912facd59cebb7138/t/5fc424103c02f22b9d8fa0fd/1606689811197/peter_brook_the_empty_space.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/47679367272.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5458bbdb33045eedefd2a/t/5fc64cd3f3de5e49b53bc83b/1606831316080/rolukowujexevulexoke.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000faae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFAAE 25364 bytes
SHA-256: 4bde381a2bd833734c36cd3b09acfb1d8c7de30d35e873e16109998fbb0c370c
font_00_sfnt_off0000c558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC558 5284 bytes
SHA-256: 331f0294af0a0186c73eb8d4922d0af000736e045f1d257cfde36d1a86b93c1b
font_01_sfnt_off0000d73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73E 10332 bytes
SHA-256: c1be176143fcb0c0faa2969b11ab44a0a7e1096ab1bc006d1f4b27dc55518508

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