Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c38356494bb8bab…

MALICIOUS

PDF

40.1 KB Created: 2020-03-27 07:47:15 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1dcd72e044d1926c2ae57b8d17b3eb65 SHA-1: 9937641ceff62d8b2fd2e98a8f14d02787f5aa79 SHA-256: 9c38356494bb8bab747640c49752b8a59139921554a4bf6a0f93725e656f08c3
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

This PDF document exhibits malicious behavior through a large number of external links, many of which point to other PDF files. The document body, though heavily obfuscated, contains references to 'Hp wireless mouse x3000 driver windows 8', suggesting a lure to trick users into downloading files. The ML classifier strongly flagged this PDF as malicious, and the PDF_SEO_LINK_FARM heuristic indicates a pattern of generating numerous links, likely for SEO manipulation or to host malicious content.

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://criservices.com/uploads/1/3/0/4/130483923/130483923.html#hp+wireless+mouse+x3000+driver+windows+8
    • http://madeandsewn.com/uploads/1/3/0/3/130323249/zipewi-dokifuroziv-fanenalojuzepiv-timuwufibufesob.pdf
    • http://d3sign3r.net/uploads/1/3/0/2/130288909/kukikesenaweke_rujize_milolunulaki_zogowibuv.pdf
    • http://www.germanbedbugs.com/uploads/1/3/0/3/130313212/xatete.pdf
    • http://www.bodiedbyshalee.com/uploads/1/3/0/6/130603761/3121362.pdf
    • http://tollski.de/uploads/1/3/0/4/130477090/doleperedusazok_widepadi.pdf
    • http://shift-it-transmissions.com/uploads/1/3/0/4/130483256/4505376.pdf
    • http://popscustomcabinets.com/uploads/1/3/0/6/130621854/bemexilasotalanofer.pdf
    • http://www.unante.co.uk/uploads/1/3/0/2/130289224/7756666.pdf
    • http://mapsunearthed.org/uploads/1/3/0/3/130379844/6249185.pdf
    • http://being-baylee.com/uploads/1/3/0/7/130738696/wivapa.pdf
    • http://waygonebook.com/uploads/1/3/0/5/130588654/wuzajoxexumuxenirug.pdf
    • http://mrsduganshomeroom.com/uploads/1/3/0/6/130621622/rapavarexa.pdf
    • http://onlineloan-payday.org/uploads/1/3/1/1/131164130/kasovatofedik.pdf
    • http://spechicago.com/uploads/1/3/0/2/130288875/wativogabigi-xipaxasefuf.pdf
    • http://riverpoolband.com/uploads/1/3/0/2/130274319/2351840.pdf
    • http://losangeles420.com/uploads/1/3/0/8/130814209/wiragifukik.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_off000071cd.bin
ef223dae6daac4de6289de0dcee1373b475ee1f5a07fcd3f21aa0c250fd58b28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71CD 8588 bytes

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