Malicious PDF — malware analysis report

Static analysis result for SHA-256 149eb0b9c58d4f34…

MALICIOUS

PDF

75.7 KB Created: 2021-06-11 19:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6846c11cd0d0a3e63e36a510a527d882 SHA-1: ee66d6be8299a91546faa8c7e4011c2892f77a9a SHA-256: 149eb0b9c58d4f34e604eac85f31aebab7041351dd9dc144a61e70792ebea539
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 0.9997

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 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://vilenefex.ru/123?utm_term=bypass+apk+android+6.+0 PDF link annotation
    • https://kotafogora.weebly.com/uploads/1/3/4/3/134322717/xerilaguvekixid.pdfIn PDF document text
    • https://komovifewujip.weebly.com/uploads/1/3/4/8/134895136/7870399.pdfIn PDF document text
    • https://judurufag.weebly.com/uploads/1/3/4/6/134688768/fudabagigum.pdfIn PDF document text
    • https://satutetijin.weebly.com/uploads/1/3/4/6/134635437/1811690.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/7839813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484356/normal_5fe9d7b085a71.pdfIn PDF document text
    • https://memumozevevu.weebly.com/uploads/1/3/4/3/134378747/gibofutavibev.pdfIn PDF document text
    • https://komojagalon.weebly.com/uploads/1/3/4/8/134885500/nadajex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410207/normal_5feb2c56cca52.pdfIn PDF document text
    • https://zegirapenutiv.weebly.com/uploads/1/3/4/3/134393596/gifeludelizavot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503309/normal_60150e4ed6835.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/ade9a588-102c-46d4-9de6-deb4f9241d93/sevebab.pdfIn PDF document text
    • http://wimarolos.pbworks.com/w/file/fetch/144510426/sakajuwamipelawofa.pdfIn PDF document text
    • http://juvozato.pbworks.com/w/file/fetch/144838599/tuwowarukupelevonopove.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/w/file/fetch/144420900/98027578767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfdca32a-03cb-455a-aea1-1feac38da4c7/bissell_quicksteamer_powerbrush_pet_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f09544c5-518d-4f61-a564-e392def96c4f/rock_band_4_songs_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86efcc13-8859-4a37-b23b-e3f33f61ad01/vogakuw.pdfIn PDF document text
    • http://rivikixizub.pbworks.com/f/54824922330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2885078b-f0c9-4eb3-b025-155605ef1940/geometry_worksheet_angles_of_elevation_and_depression_answers.pdfIn PDF document text
    • http://zalonuzojeru.pbworks.com/f/bedasixele.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_off0000e040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE040 5464 bytes
SHA-256: 8a60ad3108d7c4db81c2826c21e073d5b5e15f8a73639734e249619e89b42613
font_01_sfnt_off0000f2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F1 14960 bytes
SHA-256: f0750b8fd7778f6401dceb9201233176b7aa7190a5496847b7eac5102a4ff6ec

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