Malicious PDF — malware analysis report

Static analysis result for SHA-256 1625b3bb6cef764c…

MALICIOUS

PDF

35.9 KB Created: 2020-05-24 12:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03a3ea301c764fc65b6434c87e25b0ef SHA-1: 8f6062b327b549c50225edb4f316e572857b255c SHA-256: 1625b3bb6cef764cf180fb42122f8039d59224b364d9738005c9e89972e1fbb1
136 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm or SEO manipulation scheme, embedding a large number of external URLs. The heuristic 'SE_PAYMENT_REDIRECT_LURE' suggests a potential business-email-compromise pattern, aiming to trick users into believing there are new payment instructions. While no scripts were directly extracted, the presence of numerous external links and the ML classifier's high confidence indicate malicious intent, likely to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://65bancker.com/uploads/1/3/0/5/130551554/130551554.html#restaurant+customer+service+training
    • http://myfullsteam.com/uploads/1/3/1/4/131437025/xusasibubafag.pdf
    • http://moshathestylist.com/uploads/1/3/0/6/130603930/baperadewosalan_lakufanekesozi_malom_gasal.pdf
    • http://advanceitsolution.net/uploads/1/3/0/6/130604576/xokijetuloge.pdf
    • http://caremiles.shop/uploads/1/3/0/2/130271145/ravad.pdf
    • http://reconcyled.com/uploads/1/3/0/6/130620834/wabagino.pdf
    • http://mail.ad-woodworking.com/uploads/1/3/1/4/131406864/lonewoloxuwe.pdf
    • http://scotlandwebsitedesign.com/uploads/1/3/0/6/130622032/9071082.pdf
    • http://astopintime.net/uploads/1/3/1/4/131453485/8740776.pdf
    • http://thenetaportergroupdna.com/uploads/1/3/0/2/130272339/96702c2d15.pdf
    • http://texashistorysaunter.net/uploads/1/3/0/7/130776573/malofetimikiranit.pdf
    • http://colleenvtucker.com/uploads/1/3/1/4/131410434/dodutitudipot_laxavex.pdf
    • http://kofc6065.org/uploads/1/3/0/7/130740324/dunisixulusesudu.pdf
    • http://yuminzhang.org/uploads/1/3/1/8/131856498/liferofa.pdf
    • http://mayrivermadeup.com/uploads/1/3/1/8/131857598/ketadaximisaximo.pdf
    • http://enoughtherapy.com/uploads/1/3/1/8/131871439/gimawulezilonex_gagaf_kaxaburubefer.pdf
    • http://cpanel.benro-racing.com/uploads/1/3/0/2/130272804/3719485.pdf
    • http://starklabel.com/uploads/1/3/0/7/130738637/2597898.pdf
    • http://puntacanarestaurante.net/uploads/1/3/1/3/131383772/bevejobedo.pdf
    • http://anatdubinjewelry.com/uploads/1/3/0/5/130541763/doganex.pdf
    • http://hubertwilliamsvoice.com/uploads/1/3/1/3/131378943/7227025.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off00006258.bin
647ad249588565e389a4d99dbef28ba55942736add07b193eadcc538b6c61c15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6258 9776 bytes

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