Malicious PDF — malware analysis report

Static analysis result for SHA-256 d728aa4ae51e3dfb…

MALICIOUS

PDF

40.5 KB Created: 2020-04-03 00:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a2bfe2a8928622a2372d6973b425352a SHA-1: 58d24399451debf0c8d45f456c35fcb9b38d8a99 SHA-256: d728aa4ae51e3dfbf36a92aef603fa17972c5acd91f4f6bef57771f60f93f42a
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, a technique often used for SEO poisoning to drive traffic to malicious sites. The document body mentions 'Capital one deposit slip pdf', suggesting a lure to trick users into clicking the links. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://skylarnicestore.com/uploads/1/3/0/7/130775002/130775002.html#capital+one+deposit+slip+pdf
    • http://whitneysphotos.com/uploads/1/3/0/2/130271126/vawisa.pdf
    • http://accleaningservices.net/uploads/1/3/0/5/130551142/fimof-vutebur-fawulen-kidigapajijaxo.pdf
    • http://drinkcomkom.com/uploads/1/3/1/4/131456320/103471.pdf
    • http://tobakebelieve.com/uploads/1/3/0/6/130639958/demit.pdf
    • http://justfuego.com/uploads/1/3/0/4/130483690/raxitoka-linokudoli.pdf
    • http://tastypicasso.com/uploads/1/3/0/4/130436451/guxovexivofadodi.pdf
    • http://empowershipcoaching.com/uploads/1/3/0/4/130483309/e25e3e.pdf
    • http://shiying-cheng.com/uploads/1/3/0/4/130489081/pigoba-zulamodakilurip.pdf
    • http://rickhwt.com/uploads/1/3/0/6/130620912/096abec7aa0.pdf
    • http://offroadheritage.com/uploads/1/3/1/4/131406289/c2a79c7c30.pdf
    • http://chrisparkersportfolio.com/uploads/1/3/0/4/130436236/nixikujebili_derufogikow_rebigodalot.pdf
    • http://yourbeautifulbrain.org/uploads/1/3/0/6/130604919/99ebac6ff7.pdf
    • http://4funphotography.com/uploads/1/3/0/6/130621686/6034789.pdf
    • http://esmallsun.com/uploads/1/3/0/5/130550914/pulutuwiwewuwa.pdf
    • http://thailand-treasures.com/uploads/1/3/0/6/130604856/de2c4f0aaf.pdf
    • http://ginniarnp.com/uploads/1/3/0/5/130539338/vafojedumafe-zutusamubomax-kuxop-suvakajurov.pdf
    • http://stephenudem.com/uploads/1/3/1/0/131070619/1774209.pdf
    • http://jhpconstruction.org/uploads/1/3/0/2/130288563/momegebonu-domoni-toxutodixuz.pdf
    • http://hydragaming09x.com/uploads/1/3/0/3/130313293/gobaper_puzusimufaw.pdf
    • http://shiningstarsdaycareandpreschool.net/uploads/1/3/0/7/130775012/kupekijowobulipeli.pdf
    • http://haircandysalonoc.com/uploads/1/3/0/8/130813821/giwizotonokazoz.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_off00007693.bin
7aeeb44245051ca3993b2373d3d58ed7f2ca7520a8dbd89c316a6a08dc2c43ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7693 7768 bytes

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