Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0d1bb68eb2a779…

MALICIOUS

PDF

83.7 KB Created: 2020-11-18 09:09:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 068eb468154f5b725322e464fb443d44 SHA-1: 0fa645d49ebeab9e0e78dfa5424eed548aaf129b SHA-256: 5b0d1bb68eb2a7799aca0232d2658573f6c79afd14742d00ef768f344b131f9d
214 Risk Score

Malware Insights

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

The PDF contains numerous links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to "Self reliance emerson pdf" and "wkhtmltopdf", suggesting a lure to disguise malicious content. The presence of multiple external PDF links indicates a link farm or redirection strategy to distribute further malicious content.

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
  • 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://ggtraff.ru/123?utm_term=self+reliance+emerson+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376606/normal_5fa99ea875437.pdfIn PDF document text
    • https://fovejurifeke.weebly.com/uploads/1/3/4/3/134342496/7878836.pdfIn PDF document text
    • https://rawekawus.weebly.com/uploads/1/3/4/4/134467784/66dcffb06.pdfIn PDF document text
    • https://kololeranazi.weebly.com/uploads/1/3/4/5/134583506/timasixoburoz-femafijozamek-maxopusa-foxewaxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_5f89ac6482b08.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/satudifin/bufofojona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51689035-72f8-466b-ab86-291eb7dec792/74197994537.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/newugiguwuruwutawira.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/1536145247.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/24725666548.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/cub_cadet_mowers_zero_turn_maintenance_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/37512502871.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/skull_diagram_front_view.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a85c9d74-19b0-40f1-b40e-c18ec880215f/piano_theory_cheat_sheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF590 5404 bytes
SHA-256: c0eecb08dcb50ee4f4993c9f6fd6cbb287c6b3af8c3683798fdcf0c23c9c9939
font_01_sfnt_off000107da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DA 10560 bytes
SHA-256: 47f9e2f90c987cc0f14517c1a9269562d597081468603f284ddf34d46009601e
font_02_sfnt_off00012c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3A 16176 bytes
SHA-256: ec9986929bb8e82e8659f3ce4caa92260035ff1cb75e76a0e0d57d8883caacd9

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