Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c9cafac949dd40…

MALICIOUS

PDF

41.7 KB Created: 2020-04-02 06:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: edeab254d5f435e50d77bdb70df21246 SHA-1: 07e2964b471b45bedc309ef5a669ee718af06f25 SHA-256: 01c9cafac949dd405ef4b85f14f5a7d93cd01a52422426a491e4eb17e95df2df
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, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious document, likely intended to drive traffic to potentially harmful sites or for SEO manipulation.

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://helphomeownership.com/uploads/1/3/0/7/130775755/130775755.html#the+untethered+soul+michael+singer+vk
    • http://boujaee.com/uploads/1/3/0/5/130550994/lufojeb-jegekibonebew-pezaxifube-sogafikokekatiw.pdf
    • http://natureswaybotanical.com/uploads/1/3/0/3/130324137/dc2f3eaa.pdf
    • http://richarddongabriel.com/uploads/1/3/0/6/130605498/zajuku_noxumilawametu.pdf
    • http://timefood.it/uploads/1/3/0/4/130483248/joneru_rebipikit_safuwom_xajeka.pdf
    • http://toysandromance.com/uploads/1/3/1/4/131438577/8227530.pdf
    • http://templestoweroofing.com/uploads/1/3/0/7/130776585/burojituwamujexejuj.pdf
    • http://landingmarket.net/uploads/1/3/0/6/130640084/dc353a873b2b791.pdf
    • http://dileasconsulting.org/uploads/1/3/1/3/131384462/8573266.pdf
    • http://karasx.com/uploads/1/3/1/4/131437669/sobovetefefufobujar.pdf
    • http://healthlinkchiropractic.com/uploads/1/3/0/6/130639679/foxozupi.pdf
    • http://yourjourneytravel.com/uploads/1/3/0/6/130605509/teworaga_widizog_fezuvanis_rigozaneg.pdf
    • http://justchryssbeauty.com/uploads/1/3/0/4/130490444/relimedegofiwujurumi.pdf
    • http://area513barandgrill.com/uploads/1/3/0/9/130969077/xotarawi.pdf
    • 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_off00007de5.bin
315f21e9fa45ef67e3b1f5aeab9af75abf80658257f5f3dd334abaf7e666580f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE5 7368 bytes

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