Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e0e0b82cd9213c…

MALICIOUS

PDF

41.3 KB Created: 2020-07-08 15:38:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: f278c6051094ebcb854727fb5f61e99f SHA-1: f80febe5e6f8912bd5c76e6bd5e0b2110b405d7a SHA-256: 66e0e0b82cd9213c3e9fb72fe4814aada71394f4d40bf632f34cf0bf1566ef68
204 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its extensive use of embedded links, forming a link farm designed to redirect users to potentially harmful external sites. The document body contains a reference to 'Prism medical ceiling lift manual' and a URL that appears to be a redirector, suggesting a lure for users seeking specific information. The presence of numerous PDF links on disposable hosting further indicates a malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://ttraff.cc/wb?keyword=prism%20medical%20ceiling%20lift%20manual In PDF document text
    • http://files.downingmsband.com/uploads/1/3/0/9/130969709/11392e1c7.pdfIn PDF document text
    • http://files.monavalehospitalauxiliary.org/uploads/1/3/0/7/130738501/xivudaperesave.pdfIn PDF document text
    • http://files.explorestanton.com/uploads/1/3/1/4/131453216/6741733.pdfIn PDF document text
    • http://files.essenceofbeautydublin.com/uploads/1/3/1/6/131637057/9362341.pdfIn PDF document text
    • http://files.doggiestylezinc.com/uploads/1/3/1/8/131856430/bebadogugef-wixito-jabinopi-perafuxojiradur.pdfIn PDF document text
    • http://files.paramountrec.com/uploads/1/3/0/7/130775827/wanuvawofi.pdfIn PDF document text
    • http://files.brynscottgrimes.com/uploads/1/3/1/8/131856430/5d32f8e.pdfIn PDF document text
    • http://files.helptakeaction.com/uploads/1/3/2/6/132681938/3009213.pdfIn PDF document text
    • http://files.banksfamily2017.com/uploads/1/3/1/8/131871648/4850eb44d.pdfIn PDF document text
    • http://files.bellycomesfirst.com/uploads/1/3/0/8/130815095/pukeb.pdfIn PDF document text
    • http://files.camera1.ca/uploads/1/3/1/3/131380413/pizixejawij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xulijareda.files.wordpress.com/2020/07/tefulebuzu.pdfIn PDF document text
    • https://kesasite.files.wordpress.com/2020/07/gipasuxabureta.pdfIn PDF document text
    • https://farunowe.files.wordpress.com/2020/06/vawitovivigujibakutelupap.pdfIn PDF document text
    • https://zozumak.files.wordpress.com/2020/06/91461155675.pdfIn PDF document text
    • https://vikukixiv.files.wordpress.com/2020/06/zojufotusukukemonugog.pdfIn 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_off000063ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63CE 5112 bytes
SHA-256: 48a843add23b2def57be383ee1e56579ba527079afb311db3360703a03070f55
font_01_sfnt_off00007509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7509 10316 bytes
SHA-256: 53bd9347f0452f5f70fbb47228b2ee0d9980dbaf4a887e1b763e0803e8719639