Malicious PDF — malware analysis report

Static analysis result for SHA-256 276c0547695c596e…

MALICIOUS

PDF

75.5 KB Created: 2021-03-19 08:49:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e78e06d1af7c1bf42ae3c9838487b1d3 SHA-1: 4e5350709a51c2d58be99d691d1977d83e6a189e SHA-256: 276c0547695c596e69d1713ec9ecf92cb06feed0ea79d25f8a52c6f577f15545
134 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The ML classifier strongly indicates maliciousness, and the presence of a 'download button' lure reinforces the deceptive nature of the document. The primary URL points to a search result page that likely leads to further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/wix?keyword=financial+management+theory+and+practice+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/pulizojiwim/hdgcCl9/58858290923.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/j78MREf/jefipuxamotowoxol.pdfIn PDF document text
    • http://masajsalonunuz.com/how_to_do_cheer_flipsix7p8.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/Mggjb9f/xewafujonix.pdfIn PDF document text
    • https://kodalisurodufe.weebly.com/uploads/1/3/2/6/132680932/zesawomirupebif-fuweki.pdfIn PDF document text
    • http://bijivarudigodig.iblogger.org/can_hormone_issues_cause_high_blood_pressure.pdfIn PDF document text
    • https://cdn.sqhk.co/fejovuwov/ggicyhe/desemidusutiwavuzomobu.pdfIn PDF document text
    • http://mir23.xyz/78993617337fhvbq.pdfIn PDF document text
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/6306530.pdfIn PDF document text
    • https://jeporifitev.weebly.com/uploads/1/3/4/2/134265357/16326b87.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/26937356180.pdfIn PDF document text
    • https://woxejisuwu.weebly.com/uploads/1/3/4/3/134322210/wivizitipetilofejod.pdfIn PDF document text
    • http://zaliv2k20wowowowoow.xyz/damizomokesitfxt9o.pdfIn PDF document text
    • https://fazotevepokok.weebly.com/uploads/1/3/4/8/134865813/8502768.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/eRvhdif/bubble_tea_game_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dubanexotokegel.myartsonline.com/ribufodoseso.pdfIn PDF document text
    • http://fadojogepu.epizy.com/29457167249.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/sabipunutoroxerasonirewav.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/11161861087.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/2013_bmw_328i_xdrive_maintenance_schedule_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/collage_maker_video.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/kuliluziputawezimaxi.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_off0000e982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE982 5540 bytes
SHA-256: 0baa7c235e8ca5bef8835fce7bc97b7037e1aea355f8c42f68e7c4a8fc84326c
font_01_sfnt_off0000fc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC45 10432 bytes
SHA-256: 4862a9ff19ddce04d3683334fd306a198f5a21118ad62de415173ad98a268fe0

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