Malicious PDF — malware analysis report

Static analysis result for SHA-256 78624306f8dc7de0…

MALICIOUS

PDF

31.9 KB Created: 2020-03-23 05:57:47 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 229a76ba1ba2e02f532cae380fd67c82 SHA-1: 6b0bf78dca969a18e20a853c6fdb398f0260832e SHA-256: 78624306f8dc7de0932c82c5f151b8d81496edc28080ff1de4bf5061cfdbb761
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which appear to be part of a link farm designed to host downloadable files. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to redirect users to malicious content or downloads. No scripts were extracted, but the PDF structure and URL distribution are indicative of a phishing or malware distribution lure.

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://wolfecityhomecoming.com/uploads/1/3/0/6/130605230/130605230.html#download+how+many+drinks+miguel+ft+kendrick+lamar+mp3
    • http://edibleessential.net/uploads/1/3/0/7/130775903/mugozidoropi.pdf
    • http://healwiththerapy.com/uploads/1/3/0/7/130738715/gosok.pdf
    • http://flaviosalon.com/uploads/1/3/0/6/130604026/magozazaruvig-ledebupusemob-mukapuxam.pdf
    • http://bakerstoves.com/uploads/1/3/0/7/130740184/xenobilumuditiv_fubujidaxe_xorutefokajimet_vafelanudaguwad.pdf
    • http://www.thislairdlife.com/uploads/1/3/0/6/130604162/xuzazuseju_woriti.pdf
    • http://huguniversity.net/uploads/1/3/0/8/130874167/pivowezuwoveja.pdf
    • http://www.kindkvist.com/uploads/1/3/0/3/130323251/zaredeluwo.pdf
    • http://vpmsilverbars.com/uploads/1/3/0/7/130738779/sufiguzu.pdf
    • http://snowflakeinsurrection.org/uploads/1/3/0/4/130478314/mutupuxowirevem.pdf
    • http://yiechan.com/uploads/1/3/0/7/130739493/sisem-fopewanuvulo-gafas-xerisimotob.pdf
    • http://littlebirdapp.com/uploads/1/3/0/2/130289628/3332df71696f1c.pdf
    • http://mta-sts.mail.coricosmeticsinc.com/uploads/1/3/0/7/130775983/terirasi.pdf
    • http://erikschutte.com/uploads/1/3/0/5/130588225/wiretotuteleb.pdf
    • http://www.tnt-design-23.com/uploads/1/3/0/8/130813533/totulejugir.pdf
    • http://mirowitztorahreading.com/uploads/1/3/0/3/130323936/4559776.pdf
    • http://www.cbacreditcard.com/uploads/1/3/0/7/130775284/wesororunudibofe.pdf
    • http://www.acnightmarket.com/uploads/1/3/0/6/130639459/95c52546c1ccc8a.pdf
    • http://businessplans-usa.com/uploads/1/3/0/5/130550774/zebebivoga.pdf
    • http://absolutellc.us/uploads/1/3/0/2/130287371/bipobizapolatabed.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_off0000582c.bin
faeef7741d5921b3824af1fd752d16b657aa9d22b3bafa4ae5e6685a763f792d
pdf-font-stream PDF embedded font (sfnt) at offset 0x582C 6308 bytes