Malicious PDF — malware analysis report

Static analysis result for SHA-256 1539f16b20bce8a0…

MALICIOUS

PDF

38.3 KB Created: 2020-05-18 05:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1eee0e7548233ce6169ea6d9d76a10b7 SHA-1: 85bdc08bcad6d92ba6dd3af6238b9b44bd39cd41 SHA-256: 1539f16b20bce8a0e24642df202b18bc971580b85a10dee465d49b900ccf93be
136 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which appear to be part of a link farm designed to host malicious content. The primary lure is a link to an HTML file suggesting a 'bookworm deluxe crack', indicating a likely attempt to trick users into downloading malware. The presence of a password-protected archive lure heuristic further suggests that the document is designed to facilitate the delivery of a hidden payload.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://kelbels.org/uploads/1/3/0/4/130476712/130476712.html#bookworm+deluxe+crack
    • http://lakesidemowing.com/uploads/1/3/0/2/130289224/kujogifup.pdf
    • http://rothschildestateservices.com/uploads/1/3/0/6/130604658/fifatufo.pdf
    • http://blossomkids.org/uploads/1/3/0/5/130590521/fba255d4ccb54f.pdf
    • http://comicconspiracyonline.com/uploads/1/3/0/6/130605278/pesel_nusajeveletel_jemukikow_sizofojivoneme.pdf
    • http://carolthrondson.com/uploads/1/3/0/6/130639456/2089597.pdf
    • http://lojabrubru.com/uploads/1/3/0/6/130639439/sogogasarenaw.pdf
    • http://nvintl.com/uploads/1/3/0/6/130605016/xogokazosodenef.pdf
    • http://aberdeenmortgagegroup.com/uploads/1/3/1/3/131381489/wevik.pdf
    • http://panamacitytreeremoval.com/uploads/1/3/1/4/131483386/ragobawulafenagab.pdf
    • http://1017bud.com/uploads/1/3/0/5/130539928/gikimabo-lifunez-wakukozure-fenosamugexa.pdf
    • http://kobatim.fr/uploads/1/3/0/6/130639081/5d81225.pdf
    • http://fionaheartthekitchenshepherd.com/uploads/1/3/0/5/130543402/864378.pdf
    • http://jpagency.org/uploads/1/3/0/8/130813764/wekujufulel.pdf
    • http://crp-church.org/uploads/1/3/0/6/130621684/duxivubuvus_junulu_nuvewotemeteg.pdf
    • http://reggaeinnyc.com/uploads/1/3/0/7/130775470/73fb0ba.pdf
    • http://abelamarketing.com/uploads/1/3/1/4/131438036/29a857affbe0634.pdf
    • http://onlinewealthtools.net/uploads/1/3/0/7/130739344/5025147.pdf
    • http://thefrostproject.com/uploads/1/3/0/4/130488983/6594007.pdf
    • http://marz2019.com/uploads/1/3/0/8/130814286/vumubasebenarat-liwijivi-nozaka.pdf
    • http://screfrigeration.com/uploads/1/3/0/4/130488888/padakex.pdf
    • http://mtchoirs.com/uploads/1/3/0/6/130605254/f72873da4.pdf
    • http://harnessyourbreath.com/uploads/1/3/0/6/130621791/tegenasoxovuluxifesi.pdf
    • http://myhealingself.com/uploads/1/3/1/3/131379992/mipolanibexu.pdf
    • http://theessentialmind.com/uploads/1/3/0/7/130739247/wewoluderijasol.pdf
    • http://heartsongrecording.com/uploads/1/3/0/5/130590678/ce370c139ae.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_off000061c2.bin
26d6773b15cd8ea365982e601a180ec46d6a3a0aeb25ec4092f8e9b3d7d8d974		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C2 13320 bytes

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