Malicious PDF — malware analysis report

Static analysis result for SHA-256 70616bfdc81071be…

MALICIOUS

PDF

42.4 KB Created: 2020-03-20 11:23:54 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 69e4d41480558435b7852b81b8a05395 SHA-1: d5114d5673e8e5cc347b66395cf20f1734b08f23 SHA-256: 70616bfdc81071bef7465586e273629721546a2d0e05a7fb60116e7b8a3d164d
136 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on similar domains. This pattern is indicative of a link farm or SEO poisoning attack, designed to distribute malicious content or lead users to phishing sites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://benkregel.com/uploads/1/3/0/6/130621005/130621005.html#cancion+aromas+se+quemen+letra
    • http://hostmaster.highlightosteopaths.co.uk/uploads/1/3/0/7/130739616/budawobasuluva_tojelenared_dudatab_tevokasu.pdf
    • http://www.fecamargo.com/uploads/1/3/0/5/130545753/604e1c88ee.pdf
    • http://alksuperiornetworks.com/uploads/1/3/0/2/130272435/3680447.pdf
    • http://housevoo.com/uploads/1/3/0/7/130775075/fidivuba.pdf
    • http://baileyjohall.com/uploads/1/3/0/6/130604417/0dbb12ef25.pdf
    • http://ryanbeil.com/uploads/1/3/0/4/130435930/1108618.pdf
    • http://shihtzuhomeclub.com/uploads/1/3/0/6/130620302/zobepirerun-gazafanogag.pdf
    • http://nationalresponsibilityassociation.org/uploads/1/3/0/8/130874250/xolamemoj_diwilojewidomuv.pdf
    • http://andrewschall.com/uploads/1/3/0/6/130604522/zadinirotegejasutes.pdf
    • http://paparazzipbchicago.com/uploads/1/3/0/3/130313299/semizezoluxe_vosizixot.pdf
    • http://longislandshowroomdoors.com/uploads/1/3/0/5/130550698/9370340.pdf
    • http://tableheroes.com/uploads/1/3/0/5/130551754/3251308.pdf
    • http://firebuglite.com/uploads/1/3/0/3/130323412/negamajobab-dagusa.pdf
    • http://portugesestonethenaturalpath.com/uploads/1/3/0/2/130271212/gatagodinazurowesa.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_off00007bf2.bin
7271130ae601de6f82cfb075f55cb8fe549748cfc47e1d8cc86907c05222c66b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF2 9036 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.