Malicious PDF — malware analysis report

Static analysis result for SHA-256 6590d2b84e4a9fed…

MALICIOUS

PDF

38.2 KB Created: 2020-06-06 05:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 977b55a57a160f90d807918b27b4f609 SHA-1: a22629274d081b0c1fbcc086480b51b44e830145 SHA-256: 6590d2b84e4a9fed8995fddd1b068f170f7f34653392a7af5e9eeaa77a546423
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which appear to be part of a link farm designed to manipulate search engine results. The document body contains a lure related to a popular TV show download, and one of the embedded URLs, http://thebagbazaar.net/uploads/1/3/0/9/130969141/130969141.html#kim+milyoner+olmak+ister+indir, likely leads to a malicious site. The ML classifier strongly flagged this PDF as malicious.

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://thebagbazaar.net/uploads/1/3/0/9/130969141/130969141.html#kim+milyoner+olmak+ister+indir
    • http://thewellnesswarriors.net/uploads/1/3/0/9/130969986/dapopenosujogo.pdf
    • http://liveandlovenpdfree.com/uploads/1/3/0/7/130774973/4eb896.pdf
    • http://mysticmed.com/uploads/1/3/0/5/130588858/498314f842.pdf
    • http://mellowspaparties.com/uploads/1/3/0/5/130541733/zofitiruvoz.pdf
    • http://cashwaylumbercompany.com/uploads/1/3/1/4/131437237/6743397.pdf
    • http://routestoknowledge.com/uploads/1/3/1/3/131383532/fejokatepura.pdf
    • http://haloproductions.org/uploads/1/3/1/4/131453177/dace391889871.pdf
    • http://mail.riversidetool.net/uploads/1/3/0/6/130639849/xowewa_tafape_xisujomutumobus.pdf
    • http://applesandpearsapparel.com/uploads/1/3/0/7/130740590/482162.pdf
    • http://bebgiardini.com/uploads/1/3/0/3/130323896/5447184.pdf
    • http://theorchardatchesfield.co.uk/uploads/1/3/0/8/130874529/bbbb9f3a.pdf
    • http://recollectiveway.com/uploads/1/3/1/4/131406744/8292147.pdf
    • http://thebagbazaar.net/uploads/1/3/0/9/130969141/terms.html
    • http://thebagbazaar.net/uploads/1/3/0/9/130969141/dmca.html
    • http://thebagbazaar.net/uploads/1/3/0/9/130969141/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://pagapulikuv.files.wordpress.com/2020/06/2360509088.pdf
    • https://bamezedok238357191.files.wordpress.com/2020/06/jubimi.pdf
    • https://xorezozik.files.wordpress.com/2020/06/24967317346.pdf
    • https://jekazab.files.wordpress.com/2020/06/vizivu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063af.bin
577fa04d478c9584da63eb13de05985991d1e19ebc2b06470ad637900e1104a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63AF 12736 bytes

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