Malicious PDF — malware analysis report

Static analysis result for SHA-256 11133490d98f6c6f…

MALICIOUS

PDF

39.8 KB Created: 2020-03-31 08:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 840681261a2769cc7c2144ad596cc148 SHA-1: 45233b92eba0c121645e7c6f379f2e6ae2249172 SHA-256: 11133490d98f6c6ff1c0ace06fba7b4145ef4310c864af734fea4b2e8a9345a5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm. The document body itself is heavily obfuscated and contains what appears to be garbled text mixed with URLs.

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://aerofodder.net/uploads/1/3/0/9/130969336/130969336.html#marginal+abatement+cost+curves+pollution
    • http://seaclifflocksmith.com/uploads/1/3/0/4/130475966/vojelalobedepi-vovunisubin-pitixeto.pdf
    • http://thealzheimersillness.com/uploads/1/3/1/4/131408082/c433975.pdf
    • http://rootforcefitness.com/uploads/1/3/0/5/130540037/xajujam.pdf
    • http://beautyparty.co.uk/uploads/1/3/0/6/130621278/41ad62abcbffb.pdf
    • http://be-wellaccessories.ca/uploads/1/3/0/2/130270834/2156542.pdf
    • http://photoggrafos.com/uploads/1/3/0/7/130775921/644763.pdf
    • http://mauirealestateacademy.com/uploads/1/3/1/3/131381489/5634973.pdf
    • http://littleshoesgin.be/uploads/1/3/0/5/130540567/kowafelan_pogusexaniboxe_pilalujuti.pdf
    • http://thesupportgrouptheseries.com/uploads/1/3/1/1/131164440/8921321.pdf
    • http://nywfj.org/uploads/1/3/1/4/131406758/zenefemuwi_kenusilag.pdf
    • http://aldorle.com/uploads/1/3/0/5/130551728/6196235.pdf
    • http://extraordinarytroupe.com/uploads/1/3/0/5/130588168/xujafuxamikitatebu.pdf
    • http://globaltechwomen.org/uploads/1/3/0/8/130874330/87660eb.pdf
    • http://flowerswoodcreations.com/uploads/1/3/0/2/130289658/nosowiviralozulurezo.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_off000071a9.bin
bc289bab374f8bf0288a5ac77140f0506be89391ab3b6978a937fe620e6123a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A9 8412 bytes

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