Malicious PDF — malware analysis report

Static analysis result for SHA-256 dafbc9e34cd58ea9…

MALICIOUS

PDF

54.8 KB Created: 2020-03-15 00:47:53 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3647735bb6024d63bb1f7255b09685fe SHA-1: 9ddb497d1831f76499685f2f87e78dadbb26f129 SHA-256: dafbc9e34cd58ea94f2caf59f76647d0aabef7047cbca9d66b83783453988286
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the analysis of direct execution behavior.

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://bozhidaoyulechengguanwang.br3h.com/uploads/1/3/0/2/130273931/130273931.html#css+grid+template+rows
    • http://www.juliosedas.eu/uploads/1/3/0/6/130603684/240ea5.pdf
    • http://mielipaikka.fi/uploads/1/3/0/5/130588754/kuresuxalilomo.pdf
    • http://ajameshansen.com/uploads/1/3/0/5/130550790/8793d2.pdf
    • http://bellafurworks.com/uploads/1/3/0/6/130605161/reger-zaxiru-dogukubejebada-fuwesoxiz.pdf
    • http://growherdivorcerecovery.com/uploads/1/3/0/4/130476766/pidodepok.pdf
    • http://nrsmallgroups.com/uploads/1/3/0/4/130435673/a8df4479c363a.pdf
    • http://mscalvin.com/uploads/1/3/0/4/130476652/3408620.pdf
    • http://webmail.sarahslusher.com/uploads/1/3/0/5/130551050/wejutezop.pdf
    • http://www.fitzngiggles.co.uk/uploads/1/3/0/6/130639904/29dbb.pdf
    • http://ageinmyplace.org/uploads/1/3/0/7/130776386/buvafusateki.pdf
    • http://stylebydesiree.com/uploads/1/3/0/8/130814010/cb89e5c2.pdf
    • http://www.tulip.eco/uploads/1/3/1/0/131070972/6a16a584.pdf
    • http://mx.madelinecollins.com/uploads/1/3/0/7/130738735/f888a9e.pdf
    • http://coreenergycleansing.com/uploads/1/3/0/7/130776147/4119b757a8a360.pdf
    • http://www.davidjmudrak.com/uploads/1/3/0/8/130874666/332df4804a.pdf
    • http://neosal.com/uploads/1/3/0/6/130603783/2992907.pdf
    • http://fdprintenterprisesltd.com/uploads/1/3/0/8/130874285/rupopibubesalif_xopiruxar_kitufebemifojig.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_off0000ab9b.bin
b3cd0dff7f5194e6e95fc9abb84342c206f4f8b985828da0f304e127c2d2c034		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB9B 8960 bytes

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