Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b6084522604db1…

MALICIOUS

PDF

76.4 KB Created: 2021-03-15 11:30:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bfb77905c83328077f20cd1a1a22f5eb SHA-1: 9f7d1e32d00aece50519b1254efb07293db9d87f SHA-256: 06b6084522604db1912f61210295268afeccd2c03969d3983ab4cbbf5e302b9a
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 0.9999

Heuristics 6

  • 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 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://jacksth.ru/strik?utm_term=how+to+factory+reset+netgear+n150+router PDF link annotation
    • https://zezojafoxivofed.weebly.com/uploads/1/3/4/5/134528913/be877ed903.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426816/normal_60039b03aca50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392457/normal_5ff560f659724.pdfIn PDF document text
    • https://rozeravepirasaj.weebly.com/uploads/1/3/2/8/132816036/ea39d243956f.pdfIn PDF document text
    • http://muruxilirafet.iblogger.org/gobufujizejorazi.pdfIn PDF document text
    • https://kazumole.weebly.com/uploads/1/3/1/4/131454435/kodadetarelaluxegar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470982/normal_6000c8e0eb445.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_8eaefda3293e4024afe7caf107010ab8.pdf?index=trueIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_605bf7dfea03499a8d4078f569de7424.pdf?index=trueIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_dcd614be69e64097a92662dc18e0cca9.pdf?index=trueIn PDF document text
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_0d5f6e874de148c390b5da3db95ad380.pdf?index=trueIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_7ae284a069d449ada0190eb9471ef4f4.pdf?index=trueIn PDF document text
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_ea319b9232164a20ab2b7ae4f36dc6de.pdf?index=trueIn PDF document text
    • http://wilixafex.epizy.com/alien_shooter_4_game.pdfIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_28b58a5c975f4a1db88fbfd98258cafb.pdf?index=trueIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_8a2c0728c8a74df39fde5197efadc3eb.pdf?index=trueIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_91045cc89c664316ac20347d116638aa.pdf?index=trueIn 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_off0000ead1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD1 5488 bytes
SHA-256: a3878cb3ad14be4055a0a24fe71a84229a1c6239d733e29497b4a42e7345dd5e
font_01_sfnt_off0000fdb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB5 10952 bytes
SHA-256: eb876657aa9d61fb4527790196d734b4fc34701edfde9a889818d5effc9dc2c4

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