Malicious PDF — malware analysis report

Static analysis result for SHA-256 04fcc7d7d854216c…

MALICIOUS

PDF

88.3 KB Created: 2021-03-28 20:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 74ae8a09e4c7ac274900fa44e1d14d5a SHA-1: 189039c8485541fac16f20b049cdc6ac78166fbd SHA-256: 04fcc7d7d854216cbd09b27dd8b5b3de7efffd4e88d70e99ceaabce36292b29d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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
  • 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://jottigo.ru/wix?keyword=heide+trask+senior+high+school PDF link annotation
    • http://xidakuxekon.22web.org/45119672520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481173/normal_60189f66000a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460975/normal_604cf5cb75619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388181/normal_6042c148074ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413977/normal_601fb5a1dda3e.pdfIn PDF document text
    • http://gixotakopopunod.22web.org/45720166284.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421474/normal_5fe3e81eab42e.pdfIn PDF document text
    • http://naxenavuk.22web.org/keurig_k525c_plus_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://somizifiwij.epizy.com/foduladesagisirigawifadel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c63e25-3023-4dae-b853-b2f85acd2215/72651051371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f295cc41-5b48-4350-b668-5a4f073a18ec/75874122228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec5463a-93d7-4f55-8fac-f96d69d44e3e/72628381966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a46393dc-fc49-46dc-8fa8-af581c09d970/bewokexuzejomojebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4603c37a-48f4-4271-a008-ccdb7dd99fa1/tfs_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c271f9ce-62bb-4ece-b147-723a7a5dd663/what_does_stand_out_mean.pdfIn PDF document text
    • http://virawumeritaxo.rf.gd/vergilius_aeneas_destan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e07e5aa-c7ab-43ad-8d8d-ad045f879636/fiwusijisepudir.pdfIn PDF document text
    • http://wedofisirix.epizy.com/tratamiento_desequilibrio_acido_base.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11989 5224 bytes
SHA-256: 55aa24b85f7a5ac37849852b83a61d3237eeae7b2be1fefb1c81b827aa6f39b4
font_01_sfnt_off00012b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B45 11936 bytes
SHA-256: 15c35b6450657583545f997f22a301efd1c9d075471b67d3cc85a86f79b71f09

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