Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecb4fd0a1def2d45…

MALICIOUS

PDF

42.2 KB Created: 2020-03-21 11:46:51 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9e2a42b164d5b88d933bf08dee4ac6cf SHA-1: 1440a0dab1b04f4419fd50676f26463d712316e6 SHA-256: ecb4fd0a1def2d4546e4cc5395d1dc7b235503aa323126f0563f71f8b1bbd4ae
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier strongly indicated maliciousness. The document body contains a URL that points to a Mossberg shotgun parts diagram, likely a lure to disguise the malicious intent. The primary IOCs are the numerous external URLs embedded within the document.

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://cptsd-healing.net/uploads/1/3/0/8/130873795/130873795.html#mossberg+shotgun+parts+diagram
    • http://wikiresumen.org/uploads/1/3/0/6/130605283/toxerabo.pdf
    • http://www.autopowercar.com/uploads/1/3/0/7/130775219/powelewipemik.pdf
    • http://alllivemedia123.com/uploads/1/3/0/6/130639307/3def2d880.pdf
    • http://shillidaylaw.com/uploads/1/3/0/5/130551164/jexalufikogisadobawe.pdf
    • http://jlarcofitness.com/uploads/1/3/0/6/130603942/3280384.pdf
    • http://europeandiamondlabs.com/uploads/1/3/0/7/130739715/6748854.pdf
    • http://jhmackenzie.com/uploads/1/3/0/4/130477201/silizu.pdf
    • http://www.heartrockbeach.ca/uploads/1/3/1/1/131163683/5c225a827b2aba.pdf
    • http://chrisreed.org/uploads/1/3/0/4/130490977/pepidawa_kixorimo.pdf
    • http://josepaisdecarvalho.com/uploads/1/3/0/5/130546923/1e13ac.pdf
    • http://www.lindavandoorn.com/uploads/1/3/0/6/130639975/7260022.pdf
    • http://autodiscover.bapthetaxi.com/uploads/1/3/0/8/130814021/9322365.pdf
    • http://theblknoise.com/uploads/1/3/0/5/130545884/rutobez.pdf
    • http://braasch-sicherheit.com/uploads/1/3/0/6/130639178/4978527.pdf
    • http://adamrainbow.com/uploads/1/3/0/5/130589126/pigobigo_tosajekiwebum.pdf
    • http://fcklabels.com/uploads/1/3/0/7/130739341/a0abc9fdb8575c.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_off00007c7a.bin
b915188775e82c0ab3890270e74b672b98047f4b091f14e054e2ae456d61df79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7A 7900 bytes

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