Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d8fa0cea5c4932…

MALICIOUS

PDF

75.9 KB Created: 2020-03-09 06:00:26 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ad51a62a6acf251b957f238741db09cd SHA-1: 5c3b07f25ef50f7c4140457bffde160cf9bf7160 SHA-256: 85d8fa0cea5c4932d93530caadde978a9b9904163507931dd5afc5f2a7f4aa12
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique commonly used for SEO poisoning or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The embedded URLs point to a network of sites, suggesting a coordinated effort to distribute malicious content or phishing lures. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vera-b.pleasingfood.com/uploads/1/3/0/6/130604044/130604044.html#pathogenicity+of+fasciola+hepatica+pdf
    • http://back2balancenursing.com/uploads/1/3/0/9/130969562/mefegifelaxeg.pdf
    • http://coleinvestigations.com/uploads/1/3/0/6/130604824/somatadiz.pdf
    • http://persucarhipa.net/uploads/1/3/0/5/130589047/4665445.pdf
    • http://mx.wenonahlibrary.com/uploads/1/3/0/5/130590420/lowav_wudugiwar_fuwifuka_kakiwenogopuz.pdf
    • http://www.faderstudio.net/uploads/1/3/0/5/130588999/7f2153d4.pdf
    • http://secondstoreyhoney.com/uploads/1/3/0/8/130874426/nibozizutegigav.pdf
    • http://universalcitytreeservices.com/uploads/1/3/0/7/130775862/5641757.pdf
    • http://www.zgunrack.com/uploads/1/3/0/6/130604863/c1c62fb117894.pdf
    • http://www.creepyheadshop.com/uploads/1/3/0/7/130775219/4a197c30.pdf
    • http://noblevisioncenter.net/uploads/1/3/0/7/130775752/jowivozujux.pdf
    • http://bridlewiseridingacademy.com/uploads/1/3/0/8/130874678/notovekopa.pdf
    • http://allnetvideoandphotography.com/uploads/1/3/0/9/130969508/3a897.pdf
    • http://mail.villagevetpa.net/uploads/1/3/0/8/130873779/fesorer_bifoguvomofaneb_jejoketuni.pdf
    • http://www.worldtrailblazers.net/uploads/1/3/0/6/130622111/gawebofe.pdf
    • http://marijuanaexchangemarket.com/uploads/1/3/0/4/130476396/6527249.pdf
    • http://localfixclinic.com/uploads/1/3/0/4/130435722/01a7d8173ff0314.pdf
    • http://helicoreservices.com/uploads/1/3/0/6/130639300/4145025.pdf
    • http://www.sagesmudgespray.com/uploads/1/3/0/5/130544390/dinovedadulobenud.pdf
    • http://friendsoftoussaint.org/uploads/1/3/0/5/130546040/2873f8d2.pdf
    • http://alchemywebdesign.ca/uploads/1/3/0/4/130489082/d3105345c.pdf
    • http://www.independentautomotive.net/uploads/1/3/0/5/130538987/2547755.pdf
    • http://thesingbabysingshow.com/uploads/1/3/0/4/130489536/janeg.pdf
    • http://yhwhsc.com/uploads/1/3/0/5/130548070/2d7c0a4f8b.pdf
    • http://pkuehne.de/uploads/1/3/0/6/130639901/dexim.pdf
    • http://reachlearning.net/uploads/1/3/0/6/130604458/lavirasijezeresal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deb8.bin
af489cfb4ba9c448899bb5a7b5f3f0e18269292f386312e2dfe684ded7af2c4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB8 9896 bytes
font_01_sfnt_off0001024d.bin
41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1024D 2600 bytes
font_02_sfnt_off00010b76.bin
b3affdfdfee497c2d3230853582529cf395d265bfdbb8cde7d84ae9c33602211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B76 16036 bytes

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