Malicious PDF — malware analysis report

Static analysis result for SHA-256 a87e944ea14c2375…

MALICIOUS

PDF

41.9 KB Created: 2020-04-04 08:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: da4dbae4b9c6eb5d0d58a7b50e25d5d1 SHA-1: 21725b55c42f7af9caabc7e4dddbc525a0e0d362 SHA-256: a87e944ea14c2375bc939bb974815ef575ab1a734623595741fd2dc8fcd534b6
94 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. No scripts were extracted, limiting the ability to determine specific payload delivery or execution methods.

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://asaradesign.ca/uploads/1/3/0/3/130313178/130313178.html#imperio+otomano+mogol+y+china
    • http://demigracesblog.com/uploads/1/3/1/4/131407742/waraf_givaxalejugur.pdf
    • http://clippercityforge.com/uploads/1/3/0/3/130379627/tejitenugoxe.pdf
    • http://landscapingtacomawa.com/uploads/1/3/0/4/130488382/pikotewixigu-judapedujoziw.pdf
    • http://optimalconsultingandcounseling.com/uploads/1/3/0/6/130621576/lojejosamodixof_kemewabewamu.pdf
    • http://sylasliptick.com/uploads/1/3/0/3/130323401/e4169.pdf
    • http://mom-saves-the-day.com/uploads/1/3/0/5/130539987/d096d7d6.pdf
    • http://www.reutavisar.com/uploads/1/3/0/4/130476859/xejorakoluguxemum.pdf
    • http://cornerstorecreations.com/uploads/1/3/0/2/130273907/b30f01.pdf
    • http://scenefrapsrl.com/uploads/1/3/0/5/130539820/32bbd.pdf
    • http://desertdancetheater.org/uploads/1/3/0/5/130550772/jasisaduxozerovari.pdf
    • http://kleosnostos.com/uploads/1/3/0/6/130605475/govuludip.pdf
    • http://tenacioustranslations.com/uploads/1/3/0/6/130639121/zopugegagexenevo.pdf
    • http://krvaricconsulting.com/uploads/1/3/0/7/130776078/5743003.pdf
    • http://aljazeeraglobal.com/uploads/1/3/1/4/131438062/c6fe38a625acc.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_off000079f6.bin
46150226a0ef4a5e572cc2412b90e18a4f3ca2758b82173206bb82cd97ea2bb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F6 8744 bytes

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