Malicious PDF — malware analysis report

Static analysis result for SHA-256 088072abc8841471…

MALICIOUS

PDF

34.5 KB Created: 2020-05-16 20:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e39f91d0482ee9f130a70efd147c439 SHA-1: ac5dfef797f9823408ff1d031ff0b00fd61b6933 SHA-256: 088072abc88414713e7acaa35ed34bc55d076cbad2613a949a08eb2d66b25fa3
136 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO poisoning attempt, designed to drive traffic or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://bandicompany.com/uploads/1/3/0/5/130551839/130551839.html#australian+dietary+guidelines+2017
    • http://fuelhopelive.com/uploads/1/3/0/7/130738978/sowuvibitenixe.pdf
    • http://svkmngroup.com/uploads/1/3/1/4/131484328/duvevo-dolixazit-sixepiwede-rivatisonad.pdf
    • http://healingas1.com/uploads/1/3/1/6/131637357/sedazivelasijo.pdf
    • http://breitenbachpiano.com/uploads/1/3/0/4/130483337/5315214.pdf
    • http://all4expo.nl/uploads/1/3/0/8/130874128/pukufiduwewuvaponila.pdf
    • http://ecosattvasangha.com/uploads/1/3/1/6/131637839/1926111.pdf
    • http://mndball.com/uploads/1/3/0/3/130323675/fitizugenug.pdf
    • http://clearcompany.org/uploads/1/3/0/3/130380084/firusedajod-letopuv.pdf
    • http://iviaggichevuoi.com/uploads/1/3/1/4/131438556/vodokolid.pdf
    • http://conversationswiththewomb.com/uploads/1/3/0/4/130436224/lasejinerubogi.pdf
    • http://treasurecoasttennisassociation.org/uploads/1/3/0/5/130541133/bdcb7bb7976.pdf
    • http://shawsxvisuals.com/uploads/1/3/1/1/131163865/33269a4ec3f48.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ea1.bin
285b27e11b58f165bc0ceb0d8146081c4b348ee4ed81d243d58156be168470d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA1 9496 bytes

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