Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fb640f2543e84e…

MALICIOUS

PDF

48.1 KB Created: 2020-04-15 08:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cdd0ed850d34f6841819cccf6eeb8cbf SHA-1: 3430780ce69f7402388ba65ab261bd90bc587b67 SHA-256: 01fb640f2543e84e284d8865838fedada4e9cdb4dee5af37f8c74c32f12b0898
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the presence of numerous external URLs supports a malicious intent to redirect users. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://jammlawncare.com/uploads/1/3/0/6/130620934/130620934.html#bar+cutter+manual
    • http://thecheapdatesband.com/uploads/1/3/1/3/131381677/8f8bc2e4.pdf
    • http://teamcalhoun.us/uploads/1/3/0/4/130435531/rojanot-wawisom-xepimafunadi.pdf
    • http://europeanwadofederation.com/uploads/1/3/1/3/131379615/d8197711596a.pdf
    • http://ankenbrand-consulting.de/uploads/1/3/1/3/131398104/21228.pdf
    • http://williamshatner.space/uploads/1/3/0/6/130621120/mevuzese.pdf
    • http://firstviet.com/uploads/1/3/0/9/130969243/liwon.pdf
    • http://originsbyjane.com/uploads/1/3/0/5/130538840/65a427f6d77.pdf
    • http://citeful.solutions/uploads/1/3/0/7/130775197/sojures.pdf
    • http://shinningstarsmulticareers.com/uploads/1/3/0/7/130740264/golasodapowix_vumijofenuwuxo_popadakog.pdf
    • http://haroldhowell.com/uploads/1/3/0/6/130620677/kigusovog_wuvamatuk.pdf
    • http://ocalsports.com/uploads/1/3/0/5/130546717/8f49d7.pdf
    • http://projectrealestateagent.net/uploads/1/3/0/6/130621328/lifetojutomif-bamez-vimepurox.pdf
    • http://flowermoundfoundationrepairpros.com/uploads/1/3/0/4/130488158/xidepakenaf-xopenine-tewibekov.pdf
    • http://geraldbartlett.com/uploads/1/3/0/2/130289711/makibose.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d10.bin
fb274f83518799f78fc3ce6800a3896c64f18b0bc2a2668bb572b42109c1427a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D10 8272 bytes
font_01_sfnt_off00009ceb.bin
d405a012261030a1236a9dd27c20084fbba18530befca20423e97dac771e5411
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CEB 2788 bytes
font_02_sfnt_off0000a69e.bin
16f236da154a11fd4fe3798767745a5a360324dc8ed900c1a63f7266a21e92b1
pdf-font-stream PDF embedded font (sfnt) at offset 0xA69E 4160 bytes