Malicious PDF — malware analysis report

Static analysis result for SHA-256 150490715f886f1a…

MALICIOUS

PDF

76.2 KB Created: 2020-11-11 19:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4bf2b4975678d0996243df11ffc8aebd SHA-1: 22ec2de2263be21dd3b41084c93980560fc8c0d2 SHA-256: 150490715f886f1a717072c94f8f2f0495095acaed83d35f3a080c7a4cf9c3a5
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the document contains a large number of external links, with one pointing to a potentially malicious URL. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect users to malicious sites, possibly for phishing or malware distribution.

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://trafffi.ru/123?utm_term=indian+nose+rings+stud PDF link annotation
    • https://gudagomafefaxer.weebly.com/uploads/1/3/4/5/134523608/lapedusasuxa_rufomeg_gasan_filosomi.pdfIn PDF document text
    • https://seguronudolag.weebly.com/uploads/1/3/4/4/134468074/rusanoga.pdfIn PDF document text
    • https://kufesolujuxubi.weebly.com/uploads/1/3/4/3/134373324/xonipenu.pdfIn PDF document text
    • https://zinawadasug.weebly.com/uploads/1/3/4/3/134312837/dazoratuwipewin.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://uploads.strikinglycdn.com/files/9133fe04-7952-4009-a0ed-e4900adfb7e5/the_notebook_full_movie_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c5cfa7d-9d16-40ad-91f3-ebcd1c4502d4/mipumubobigajukapewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6392992f-33f8-49ba-9158-67115ba4f687/95329168443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9a17d25-3d4c-4a07-9597-30decfebe572/ragitizepak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c87690d4-6969-40d4-a3d5-42fa3aac45f9/37025061848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/205d83bd-4c7d-43fe-9d69-75b784bfd944/portland_public_schools_writing_grade_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39d817dc-1c0e-4419-85c7-9f064007a863/83493051824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5324e583-02fc-42fc-956a-4aa46255f1a9/mezipupuj.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_off0000e365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE365 4780 bytes
SHA-256: 2c4a60e92ef730360417c7ce6444c8dd9fd5b8ea1408e86fc3462e2e93897ff4
font_01_sfnt_off0000f3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A7 10064 bytes
SHA-256: 1104c2babdf12dab4008d33203c13c510f944f4c8a17a6a7676cdda9b3ff7c71
font_02_sfnt_off000115d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D0 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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