Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ba18795e85319d…

MALICIOUS

PDF

42.8 KB Created: 2020-03-28 11:15:11 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0308193873bf997fa106447a08a7fd22 SHA-1: 70b1e0d5809ac40f1732aaae1fe3efd4e9d2763b SHA-256: 04ba18795e85319d2cf3f558c0fc9b221d7871b08e2542975cf9c28b0bd21a7d
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though partially corrupted, contains references to 'wkhtmltopdf' and 'Qt', suggesting it was generated by a tool rather than authored directly. The primary function appears to be directing users to a vast array of other PDF files hosted on numerous domains, which is a common tactic for SEO spam or to distribute further 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://ninjatrn.com/uploads/1/3/0/5/130550696/130550696.html#numeracion+y+vi%C3%B1etas+en+word+2010+ejercicios
    • http://lffitnesshamptons.com/uploads/1/3/0/4/130483959/tewumezebiror.pdf
    • http://hhholmesthemusical.com/uploads/1/3/0/6/130621727/xatukunurarap_situsepasopivox_buzelenaja.pdf
    • http://lonnyelitehomes.com/uploads/1/3/0/6/130639162/wakirurijefomiwelasu.pdf
    • http://foundationalwellness.info/uploads/1/3/0/6/130639895/xakepimudakoz_kovagunaxibubus.pdf
    • http://www.high5lunch.com/uploads/1/3/0/6/130604838/gefejok-sononufador.pdf
    • http://elias-alldoneconstruction.com/uploads/1/3/0/3/130379902/c9e87f.pdf
    • http://mail.leelegantmacaron.com/uploads/1/3/0/7/130776047/4007684.pdf
    • http://www.pfaa.net/uploads/1/3/0/3/130323900/791c01d9.pdf
    • http://marychristinebrennan.com/uploads/1/3/0/6/130603858/1535314.pdf
    • http://occiv.com/uploads/1/3/0/3/130379523/f67ee7a599.pdf
    • http://moldremovaltarzana.org/uploads/1/3/0/5/130538870/7697772.pdf
    • http://elektrogenesis.com/uploads/1/3/0/7/130775929/beponi.pdf
    • http://mail.complexity-aesthetics.com/uploads/1/3/0/8/130873820/rivutuxem_bapuxowe.pdf
    • http://noxonroadpta.com/uploads/1/3/0/4/130436139/wixapejil.pdf
    • http://rcrlogistics.net/uploads/1/3/0/7/130738893/litikotigum-nugil-givinibede.pdf
    • http://bewellmindset.net/uploads/1/3/0/7/130739098/3170698.pdf
    • http://jstepp.net/uploads/1/3/0/3/130313854/4747258.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007307.bin
c9a0ef8a357aec4c1e6fb98bc5841e999f1137aada7e5fbc84b5d16f7c9b6a8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7307 1792 bytes
font_01_sfnt_off00007b25.bin
57938127130438b64acd5fc0842cce7dc02165dbdf1141cc3f19cc194f5282be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B25 8932 bytes

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