Malicious PDF — malware analysis report

Static analysis result for SHA-256 30496c90a0bf5a81…

MALICIOUS

PDF

89.3 KB Created: 2021-03-23 20:55:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3cca240d1032a9cda0ee0f534ebb5e5c SHA-1: 9b5b5ee8865de5add607210146baba86314bbaca SHA-256: 30496c90a0bf5a8167dfc4cdfc46795c704451bc4e4ebe41ac0981df5d3fce7a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment 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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ponafet.ru/award?keyword=chemical+bonding+vsepr+theory+pdf PDF link annotation
    • https://cdn.sqhk.co/migixurej/kyifhij/74759605521.pdfIn PDF document text
    • https://cdn.sqhk.co/nafusomo/inq786c/zombie_gunfire_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453902/normal_5feccad604847.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/c1ighiX/80876529233.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/buvinobitatoxivejuzalejul.pdfIn PDF document text
    • https://dikasawo.weebly.com/uploads/1/3/5/3/135349802/dodojak_xepibirole_ninod.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/ijAEiem/55232516551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403680/normal_6040275373d67.pdfIn PDF document text
    • https://kobetuditi.weebly.com/uploads/1/3/4/4/134446504/tamafesonawe-waduxeloguf-makasekefer.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/2EGhbhc/junasebepefaxumavid.pdfIn PDF document text
    • https://sujujiga.weebly.com/uploads/1/3/1/3/131379538/1057934.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/higghij/geragejatibegopa.pdfIn PDF document text
    • https://cdn.sqhk.co/nefowumik/X0RwmQ4/52565075736.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425723/normal_5fce796a2f0e4.pdfIn PDF document text
    • https://torolanomopefi.weebly.com/uploads/1/3/0/7/130739669/9424865.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b12e7f6-866b-4dc0-b9fc-ee95ab1f7006/79380177781.pdfIn PDF document text
    • http://luzojora.atwebpages.com/nutrition_books_for_bodybuilding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b1a38f-bb83-4b12-82c8-acd154b1f8cb/journey_to_the_west_movie_in_hindi_720p.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/4106657262.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_off00011eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDA 5776 bytes
SHA-256: a6b194b361ac64877366e71d0ea14854e71d66430a4faa6cb44def4b3012a878
font_01_sfnt_off00013258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13258 11064 bytes
SHA-256: 3d53bf5b71fcbf545287bcb880e8c171988573cf308799acb27ce29056e3aee8

Open this report in the interactive analyzer, or submit your own file for analysis.