Malicious PDF — malware analysis report

Static analysis result for SHA-256 6956802baee2bb51…

MALICIOUS

PDF

40.4 KB Created: 2020-05-16 20:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f10c56c5c248326d61e8b6439aaa197 SHA-1: 4cf84996a196054f39730a94b3f5ea10d8b54ace SHA-256: 6956802baee2bb519a67a514ed632ab9b4025f59e84be93b67179a2542a885d6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links to other PDF files hosted on various domains. The ML classifier and the PDF_SEO_LINK_FARM heuristic strongly indicate malicious intent, likely for SEO spam or to distribute further malware. No scripts were extracted, but the sheer volume of outbound links suggests a coordinated effort to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

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://lanewoolner.com/uploads/1/3/0/3/130323355/130323355.html#bams+course+full+form
    • http://lhvbresources.com/uploads/1/3/0/6/130605253/aaa84a79d7a7.pdf
    • http://joyofphysics.com/uploads/1/3/0/6/130640021/9677661.pdf
    • http://aromachologies.com/uploads/1/3/0/6/130639285/wujebulupe_wokugof_zazagawumejan_zizanufegusafil.pdf
    • http://dermblog.com/uploads/1/3/0/4/130488934/e27cd316.pdf
    • http://sophiebernier.com/uploads/1/3/1/8/131858353/00b5e5.pdf
    • http://kingmesocks.com/uploads/1/3/1/4/131454270/wetufimemu.pdf
    • http://thepeanutpatrol.org/uploads/1/3/1/4/131408241/kakodof_vanusotug_sezud_gisenetoza.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072ed.bin
153e39c8403033c66471cc4a4ccb26396b955c25cd6ead6621c9a99223b84176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72ED 10636 bytes

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