Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a81bfa77a93386b…

MALICIOUS

PDF

43.0 KB Created: 2020-03-20 15:09:51 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 47a0a497f8a61b57bbd956ca4753fb40 SHA-1: d36dce420fd46e0cc33872ac799ad6d16c34e02c SHA-256: 5a81bfa77a93386bb0b9a73687aa68ff6ef7b0564c2688fafaad74faf68ac17a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits a high-risk profile due to the presence of numerous external links, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and the sheer volume of outbound links suggest an attempt to redirect users to potentially harmful websites, possibly as part of a phishing or content-luring scheme.

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://pivotpointsolutionsgroup.com/uploads/1/3/0/6/130639221/130639221.html#libros+sobre+psicologia+del+consumidor
    • http://danlynnwatt.com/uploads/1/3/0/4/130483413/wugivabozosubagudaw.pdf
    • http://bcroofingcompany.com/uploads/1/3/0/5/130539022/lerafubufotewobewug.pdf
    • http://cathyevansrealtor.com/uploads/1/3/0/6/130620393/9025601.pdf
    • http://thingraniteveneer.com/uploads/1/3/0/6/130639493/xomevade.pdf
    • http://cutrights.org/uploads/1/3/0/7/130738554/7974175.pdf
    • http://tayshairdepot.com/uploads/1/3/0/6/130621557/kawonudemetuj-mitarorufuvomiz.pdf
    • http://newb-sa.org/uploads/1/3/0/3/130324326/8452897.pdf
    • http://gebhardtministries.org/uploads/1/3/0/5/130551206/e88ec526fe9eb27.pdf
    • http://orellanasteel.com/uploads/1/3/0/7/130775299/4625033.pdf
    • http://hostmaster.capricornglass.co.uk/uploads/1/3/0/3/130379314/99228.pdf
    • http://mywritingcheck.com/uploads/1/3/0/2/130287872/3643138.pdf
    • http://luxusfix.com/uploads/1/3/0/7/130775164/13e809.pdf
    • http://bunnystravel.com/uploads/1/3/0/6/130621510/6519415.pdf
    • http://calsap.org/uploads/1/3/0/3/130323814/2213425.pdf
    • http://www.plyboysmanufacturing.com/uploads/1/3/0/6/130621946/3606346.pdf
    • http://dbtdelaware.com/uploads/1/3/0/7/130776336/b3cadbc951b5a.pdf
    • http://mirasbigday.com/uploads/1/3/0/2/130289476/mononuxubola_fikotawo_sumoxagujemiwuf_masomas.pdf
    • http://8eight8.club/uploads/1/3/0/8/130874134/jivelaxovojajaxaj.pdf
    • http://originsmanagement.net/uploads/1/3/1/0/131070574/2080162.pdf
    • http://metdesigngroup.com/uploads/1/3/0/6/130620280/c75c4638f26.pdf
    • http://coppiceandcanvas.com/uploads/1/3/0/7/130738762/5bcf62fc089b5cc.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_off00007ed9.bin
3aa20846c58c19bccc18bd26dec7adc19e40220570a6c86ebe5571222f7f3b46
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED9 8144 bytes