Malicious PDF — malware analysis report

Static analysis result for SHA-256 615d2cc38ce31177…

MALICIOUS

PDF

44.1 KB Created: 2020-03-22 07:46:47 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 150abd79ea748af896c5797d53448667 SHA-1: f4bedf86981e2115d0ef4b9a5c710e746f8acd2a SHA-256: 615d2cc38ce31177b6e4e507dffe73870df9110cd409c903ced5fb959d177e8f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of external links to other PDF files hosted on various domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier also strongly flagged this file as malicious. The embedded content and numerous URLs suggest a link farm or redirection scheme, likely intended to drive traffic or distribute further malicious payloads.

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://bashbytara.com/uploads/1/3/0/4/130483443/130483443.html#el+tunel+resumen+personajes
    • http://davekuhn.com/uploads/1/3/0/3/130323164/7348169.pdf
    • http://bridgetownbaroque.org/uploads/1/3/0/2/130272388/06ec1f57f12a07.pdf
    • http://mybathbuddy.com/uploads/1/3/0/2/130288380/mojikoxibexeru_guwepexudodet_debelumog.pdf
    • http://artcenterlosangeles.org/uploads/1/3/0/6/130639741/2416788.pdf
    • http://brave-lifestyle.com/uploads/1/3/0/5/130539336/xutoroputurixudo.pdf
    • http://www.tpendleburyphotography.com/uploads/1/3/0/4/130491599/daa502c19.pdf
    • http://covenantfellowshipchurches.org/uploads/1/3/0/7/130739906/688ca1dd659d127.pdf
    • http://gilbertsonpools.com/uploads/1/3/0/3/130313728/refonogokobak.pdf
    • http://sapporobeauty.com/uploads/1/3/0/4/130477018/vijudixumiso.pdf
    • http://methodistsoccer.com/uploads/1/3/0/2/130289369/zelijixugutukew.pdf
    • http://chanithehippie.us/uploads/1/3/0/7/130775075/4449591.pdf
    • http://nativeuniques.com/uploads/1/3/0/7/130739261/xawimejutot-taramusodovote-zasatovuw-demurule.pdf
    • http://doodle-prints.com/uploads/1/3/0/7/130738680/kebubidil.pdf
    • http://miguelsanomovie.com/uploads/1/3/0/7/130740571/4970494.pdf
    • http://agentcraft.org/uploads/1/3/0/9/130969434/8912352.pdf
    • http://mattprahl.com/uploads/1/3/0/2/130288465/riduzixugiv.pdf
    • http://freelas.net/uploads/1/3/0/8/130814714/3658b29f55b5a.pdf
    • http://definitest.com/uploads/1/3/0/6/130621582/xabixalamibaxe.pdf
    • http://kmaemyyoungin.online/uploads/1/3/0/2/130289189/20edb86.pdf
    • http://radmag.com/uploads/1/3/0/6/130605331/a1b567dea69.pdf
    • http://kingsbluffhomes.com/uploads/1/3/0/6/130604375/tojuxo.pdf
    • http://shoptheluxebaby.com/uploads/1/3/0/3/130379777/lasabanoxazaberevut.pdf
    • http://autodiscover.brazosvalleycheese.com/uploads/1/3/0/5/130543466/08abab.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_off0000843b.bin
8c845a9132ea10cc64b9cc4614f31acab3a3cf27bf469f7944ea83ef3e5d12fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x843B 7924 bytes