Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fdda39eff2d58ba…

MALICIOUS

PDF

32.9 KB Created: 2020-05-18 03:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f24b0885e1bc01db6055e22063fee3f4 SHA-1: 5757aec7d0329e1b280236de65a2678c742e1520 SHA-256: 1fdda39eff2d58ba1251605821f8b593c7f0be8f134813120da0d6e2734e29ce
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, a common tactic for SEO poisoning or distributing malicious content. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains URLs that appear to be part of a link farm designed to direct users to potentially harmful websites. The primary attack pattern involves leveraging these links for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://louvinapartment.net/uploads/1/3/0/3/130313741/130313741.html#printable+reading+comprehension+worksheets+for+3rd+grade
    • http://getyourbody.org/uploads/1/3/0/6/130604042/gupikibelexunumuni.pdf
    • http://cube-international.com/uploads/1/3/1/4/131406253/f61877ab.pdf
    • http://meeplesden.com/uploads/1/3/0/6/130622032/8934656.pdf
    • http://universeofsecurity.org/uploads/1/3/0/5/130590738/d3ad49b5.pdf
    • http://mnbuildingrestoration.com/uploads/1/3/0/4/130476912/gugib-kikulidofi.pdf
    • http://osaapps.com/uploads/1/3/1/3/131379420/revedazone-nuvitasajilini-girugake.pdf
    • http://pilatesbycoco.com/uploads/1/3/0/7/130740212/reripinuwener_pizizelifaw_livatuwutenukum.pdf
    • http://dollarstore-plus.com/uploads/1/3/0/6/130620909/de692f.pdf
    • http://themastersbusinessalliance.com/uploads/1/3/0/8/130874530/pozubujoxigatuje.pdf
    • http://veganvibes612.com/uploads/1/3/0/6/130640132/cdbc8.pdf
    • http://lulabysarah.com/uploads/1/3/1/1/131164266/ed267533d441.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_off00005603.bin
a9d5ce0eff724750d4945ec84109815b26b71dd157952907c15a30a42e380534		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5603 10048 bytes

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