Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b72dd2f4702faef…

MALICIOUS

PDF

32.4 KB Created: 2020-04-01 17:41:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 153ac516b789adc937f1a0aa1f001d93 SHA-1: 212a9928b910ea446066bc58de6a3546c2863048 SHA-256: 3b72dd2f4702faef7c01cd55f1bf916fd4842db795621d365d301c6e4553620e
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to PDF files hosted on various domains. The document body mentions 'Papa john's menu order online', suggesting a lure to trick users into clicking malicious links. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves a link farm designed to redirect users to potentially harmful content.

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://social-reign.com/uploads/1/3/1/3/131398386/131398386.html#papa+john%27s+menu+order+online
    • http://beethovenslatening.com/uploads/1/3/0/4/130436218/a200659a9c2024.pdf
    • http://skinboostlab.org/uploads/1/3/0/9/130969211/7492204.pdf
    • http://munkireport.do.mrazamerine.com/uploads/1/3/0/7/130775195/18c7ff44ddb1.pdf
    • http://mimiwong.net/uploads/1/3/1/0/131070820/4902532.pdf
    • http://titanedtalk.com/uploads/1/3/0/4/130489080/borivubo.pdf
    • http://terrymartinhekker.com/uploads/1/3/0/6/130604141/nituba_boporibopedubag.pdf
    • http://denequia.com/uploads/1/3/0/6/130639896/zasunopek-xapesajogamom.pdf
    • http://schoolprojectfoundation.org/uploads/1/3/0/6/130640101/2367678.pdf
    • http://momalmighty.com/uploads/1/3/0/3/130313218/kalojusofejoriw_dekefejizimob.pdf
    • http://npnewbies.com/uploads/1/3/1/3/131380436/7686204.pdf
    • http://alixmillerdesign.com/uploads/1/3/0/4/130483320/7029052.pdf
    • http://affordablemediaus.com/uploads/1/3/0/6/130621917/musakuvem.pdf
    • http://bbeboutiquellc.com/uploads/1/3/0/3/130313054/gojowetu-luxogazunidinej-juwawozebevu-bajog.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_off00005924.bin
0c6b9eccbc8a80fde1b3430baab51d80c57a6aa462897a63e4d43e2e7400ef6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5924 6952 bytes

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