Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2c4a3c112b9225…

MALICIOUS

PDF

42.6 KB Created: 2020-03-28 03:51:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e88e1fd164783dc624d7879411cd316a SHA-1: 0c154d79c2dabb92cc06e20a639becb45d0db805 SHA-256: bb2c4a3c112b92250518f0aff6ccc0f51a8a9c3e7e7a6b1a10ea7700d94fa20a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document exhibits characteristics of a link farm, with numerous external URLs embedded within its structure. The ML classifier strongly indicated maliciousness, and the presence of many external links suggests an attempt to manipulate search engine results or redirect users to potentially harmful content. No scripts were extracted, limiting the analysis of direct payload execution.

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://pencilpenservices.com/uploads/1/3/0/3/130324340/130324340.html#cleric+spell+list+5th+edition
    • http://www.californiaweldinginstitute.org/uploads/1/3/0/4/130483587/jerewelasorupowuvij.pdf
    • http://memofortherecord.net/uploads/1/3/0/3/130379287/9332dd52c2.pdf
    • http://www.thebaucespeaks.com/uploads/1/3/0/6/130604672/4840f.pdf
    • http://allmanconsultants.com/uploads/1/3/0/4/130483416/9835150.pdf
    • http://gyse.org/uploads/1/3/0/2/130288455/razejinirixibubo.pdf
    • http://www.hdndatabase.com/uploads/1/3/0/5/130539022/2c173e13b.pdf
    • http://takeabowkilmarnock.com/uploads/1/3/0/7/130739188/73ec16753dffb4b.pdf
    • http://yoyotk.com/uploads/1/3/0/2/130272435/5040999.pdf
    • http://jaredwright.com/uploads/1/3/0/7/130775841/7736414.pdf
    • http://ultimatecontradiction.com/uploads/1/3/0/6/130620163/7f71f9a6091f.pdf
    • http://www.zscaler.africa/uploads/1/3/0/6/130604907/nawowow_ribaxu_manefawopiwo_gajatuxesavowiz.pdf
    • http://yorkshiredigitalconsulting.com/uploads/1/3/0/8/130813135/2843701.pdf
    • http://primorphism.com/uploads/1/3/1/3/131381761/4562221.pdf
    • http://renosoul.info/uploads/1/3/0/7/130776676/ce67c88b7d3b5f.pdf
    • http://cruzfamily.org/uploads/1/3/0/6/130640094/a1f38b73cd0f.pdf
    • http://the-empowered-warrior.com/uploads/1/3/0/4/130476074/dewot.pdf
    • http://richardtallent.org/uploads/1/3/0/2/130291800/bazevenolerenad-rukemuluxulo.pdf
    • http://www.binnachcharacters.com/uploads/1/3/0/4/130476014/822397.pdf
    • http://sthillen.com/uploads/1/3/0/7/130739782/vazipokixekikun.pdf
    • http://ntagent.com/uploads/1/3/0/7/130776824/43055dc9.pdf
    • http://webdisk.stfoafriscospanish.org/uploads/1/3/0/9/130969967/2147694.pdf
    • http://cotherstonecoal.com/uploads/1/3/0/5/130588261/1602815.pdf
    • http://sthillen.com/uploads/1/3/0/7/13
    • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d68.bin
2501dcf57e3f6b1d35c62a9bae4697ef96213a716d229b1477dd220e091a2a44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D68 7584 bytes

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