Malicious PDF — malware analysis report

Static analysis result for SHA-256 3607d6e43060abc5…

MALICIOUS

PDF

70.1 KB Created: 2021-02-25 07:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a42d01a3b5885f184b2fc724015b7274 SHA-1: ace55744d1841d3ffc75d1c992d447b1a2813f16 SHA-256: 3607d6e43060abc5982d60154318ed38daa3f6f212af20738528bbadba5f68f9
66 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and appear to be part of a link farm. The ML classifier strongly indicated maliciousness, and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic confirms the suspicious nature of the embedded links. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', suggesting it was generated by a tool rather than being a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://jacksth.ru/wix?keyword=adulthood+is+a+myth+pdf+free PDF link annotation
    • http://gazzsheff.xyz/siviwejopidiqa2t1.pdfIn PDF document text
    • http://eeeeeyyy.space/medadosbc8wh.pdfIn PDF document text
    • http://card2card.live/fortnite_burger_.netk5ojx.pdfIn PDF document text
    • http://winoorama.site/hamlet_the_movie_1996_watch_online1dlmc.pdfIn PDF document text
    • http://changepass.online/mercruiser_5.0_engine_oild7ji5.pdfIn PDF document text
    • http://dreamingdeveloper.com/billardtisch_selber_bauenzf8bz.pdfIn PDF document text
    • http://topdiscount.pro/what_do_i_feed_my_green_tree_frogme2xb.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/ancient_greek_day_activities_ks2.pdfIn PDF document text
    • http://dvertsoff.ru/8015778835xnawx.pdfIn PDF document text
    • http://kengoru.space/125387241069gc69.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/favemoxobes.pdfIn PDF document text
    • http://hangzhoumetal.ru/41514443432r82j9.pdfIn PDF document text
    • http://healsmall.space/how_reliable_is_the_king_james_translation00x9s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pozidijapepore.atwebpages.com/20859359572.pdfIn PDF document text
    • http://bugenerefajujus.atwebpages.com/xuzakodumirubumekive.pdfIn PDF document text
    • http://tuzawuza.epizy.com/atresia_pulmonar_con_septum_integro.pdfIn PDF document text
    • http://derazikabulode.epizy.com/69164389970.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66F 5372 bytes
SHA-256: 26bfedf1afb692a0d330149b6815f6269417a281666dc520796e7e4aa0ec19af
font_01_sfnt_off0000e893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE893 10160 bytes
SHA-256: ce82be202db1f58e603409c148300ef6c40e79889721c51a95a64247e3046f9b

Open this report in the interactive analyzer, or submit your own file for analysis.