Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a29d36a7a306a4…

MALICIOUS

PDF

159.0 KB Created: 2021-03-19 09:03:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8bb852ddccde1e51bb54501dbdb366de SHA-1: f0c407c146cfcf8502b1de340d34eaddc8369474 SHA-256: 46a29d36a7a306a411edfb5f0e0cdc6e6e6baba7838423f83cff3cf9717b6d9a
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9872

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://dafemum.ru/strik?utm_term=diary+of+a+wimpy+kid+double+down+pdf+yumpu PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411923/normal_5ffe8a62a5d1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424347/normal_5fe118011370e.pdfIn PDF document text
    • http://pemegira.22web.org/vibevifujutivigifu.pdfIn PDF document text
    • http://jidokove.scienceontheweb.net/bovisenenuwizevetulotig.pdfIn PDF document text
    • http://xipuxolidumix.22web.org/git_commands_list_github.pdfIn PDF document text
    • http://dipazekonowa.mypressonline.com/random_sampling_definition_in_research.pdfIn PDF document text
    • http://fovagenifozemub.iblogger.org/ruzuzav.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/data_structures_in_cpp_tutorial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450721/normal_604004e029d88.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://futotodogedujox.epizy.com/38108790228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd387014-72f5-4650-a37e-32b5dded5589/habits_of_mind_posters.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/rolupuwup.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/8156053652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01d51f33-1b3e-47e6-90a6-0835d133deec/70383687527.pdfIn PDF document text
    • http://wipupagajefi.rf.gd/venilefatojejutosumimu.pdfIn PDF document text
    • http://xazikipigenuvi.rf.gd/income_guidelines_for_wic_in_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb7006c8-43cb-40a9-926e-1ee2ccc025a5/lobawel.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24886 5404 bytes
SHA-256: 3505079ac7f8dec4c376736bc155270e73d478812478045651b7c3216cc8f96f
font_01_sfnt_off00025af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25AF5 11684 bytes
SHA-256: b99d70eb7f87839b7a19267c71cbb81fd455648049f1f7278bbd48432a1b7c53

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