Malicious PDF — malware analysis report

Static analysis result for SHA-256 7367a6dcc34c6e95…

MALICIOUS

PDF

87.6 KB Created: 2020-12-25 23:03:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1542c8655bb1de855b157668ebd4d9fc SHA-1: 933fc1785e1e4ed442d2e6095128e175955a2890 SHA-256: 7367a6dcc34c6e95eb429baa2a90aee2988a2d302500867d365b5529091edbfe
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file exhibits malicious characteristics, including links to known malicious redirectors and a large number of external PDF links, suggesting a link farm for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://traffmen.ru/aws?utm_term=securus+cctv+camera+software In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377388/normal_5f8e4070a6f34.pdfIn PDF document text
    • https://zarujiwimil.weebly.com/uploads/1/3/4/9/134900424/sezota.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425916/normal_5fd79d8add729.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506063/normal_5fd911e45878f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475380/normal_5fd3a24110ec9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5faab90c88921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5f8d6f4a84e07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448539/normal_5fd1705dadd18.pdfIn PDF document text
    • https://kudoxere.weebly.com/uploads/1/3/4/5/134591480/6c2f863a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5fae3299b35c5.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://s3.amazonaws.com/rozebofukixus/ampoule_face_mask_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/feliz_navidad_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/indonesia_visa_application_form_bangladesh.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011ac4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11AC4 22836 bytes
SHA-256: 6c0a37096f7b0b5967804fca33b678090e80cffdad90fdcd4943250a3368bc72
font_00_sfnt_off0000e5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A0 4976 bytes
SHA-256: b5630f21f145d8f7f24be6442a7ea10e45979365009ec1ffeafb8c6a22871799
font_01_sfnt_off0000f699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF699 10572 bytes
SHA-256: 9af7d71bfce5ebd158fec222722bdda83e095d8f2ef69e6fc082efa2eeac6448
font_03_sfnt_off000142db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142DB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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