Malicious PDF — malware analysis report

Static analysis result for SHA-256 06684fea902bbfef…

MALICIOUS

PDF

69.6 KB Created: 2020-12-03 14:55:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a084ca9a4b8c9534dfbcc1c8b93a6dd0 SHA-1: b93e221508e967f1533df585dbce9a0bc4efde43 SHA-256: 06684fea902bbfef844489dc538a8a3324b19eb7ed473d99fc48f4f3357a2524
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, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier also flag this as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards malicious activity, likely related to directing users to potentially harmful sites.

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://trafftec.ru/123?utm_term=unity+reorderable+list+inspector PDF link annotation
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/resebubede-gafifetomo-sexosatasuvole-jijazusifa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393208/normal_5fb967bd5db08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376858/normal_5f8aca3c75872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374536/normal_5f912965c96ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491155/normal_5fc3f9fd1cb05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5f8e9679841c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417403/normal_5fb7309175339.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380701/normal_5fa9737c68f86.pdfIn PDF document text
    • https://jotitotibewava.weebly.com/uploads/1/3/1/3/131383271/3464558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387702/normal_5f97254b1829f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411001/normal_5fb370e573f20.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/5fc0d6c88787e879896ba956/t/5fc45831bc819f1cf463705e/1606703154327/folataxarizevonozekizalot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf57b05147b148042a4b19/1606375346774/south_chagrin_reservation_map.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e88b8139af0376454bd0/t/5fc214292dd96f5918365307/1606554669845/tokyo_mew_mew_ichigo_transformation.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_off0000c584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC584 5088 bytes
SHA-256: d54bbf1c7189cefd20a2c6c79ad624dfa49e2f95dae3f2a50940ef3cd256475d
font_01_sfnt_off0000d6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D2 10644 bytes
SHA-256: 1a3ab7903aceb62d5f3997e2cfc7b8e8e421ef36666e20d06a2f401bb29fae9d
font_02_sfnt_off0000fb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB35 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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