Malicious PDF — malware analysis report

Static analysis result for SHA-256 c676456ee792bad7…

MALICIOUS

PDF

82.6 KB Created: 2021-03-27 11:54:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0d58a91fd39050fea45b77cee1b71abc SHA-1: 2474d9ae71b05daf6f1c68c5233b89a046350c27 SHA-256: c676456ee792bad7f11954256effde1e86a817f663aa4ab048c7f431db85b8d0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic identified it as a link farm designed to redirect users. The presence of these links suggests the document is intended to lead users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/strik?utm_term=will+beats+repair+my+headphones PDF link annotation
    • http://zijixiteluwek.scienceontheweb.net/wigurasepet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488604/normal_60051a4590137.pdfIn PDF document text
    • http://hotita.fun/hungry_shark_mod_apk_freem0jkg.pdfIn PDF document text
    • http://idealica-italiaoficial.site/photo_editor_pro_mod_apk_free_downloada5iwa.pdfIn PDF document text
    • http://vozivovog.scienceontheweb.net/57033952066.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/82562861418.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403119/normal_5ff4d97562e9f.pdfIn PDF document text
    • http://tazasimeli.22web.org/57384528975.pdfIn PDF document text
    • https://cdn.sqhk.co/fubebevukad/jdXicjf/form-_control_dropdown_bootstrap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417139/normal_6027ff93adc0c.pdfIn PDF document text
    • https://cdn.sqhk.co/gesokusa/jaidKij/nosomakafer.pdfIn PDF document text
    • http://rakadan.sportsontheweb.net/vector_calculus_textbook.pdfIn PDF document text
    • http://pafiwuz.66ghz.com/pulirexor.pdfIn PDF document text
    • http://zosatus.22web.org/28090955497.pdfIn PDF document text
    • http://vaxiliwu.medianewsonline.com/72895870132.pdfIn PDF document text
    • https://cdn.sqhk.co/dodalowogiv/cfjwAHu/paludireximiji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401691/normal_601258eb58272.pdfIn PDF document text
    • http://pedron.fun/there_is_there_are_exercises_klasa_587enq.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimofaw/hcwjeOJ/xotiwewiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414851/normal_600c7efc2e4c7.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/Ork65jg/46927824866.pdfIn PDF document text
    • http://ufenmac.com/12611528463evpcn.pdfIn PDF document text
    • http://jewogipuwivi.medianewsonline.com/jurnal_karakteristik_ajaran_islam.pdfIn PDF document text
    • http://lukufogud.getenjoyment.net/61093423519.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ragigixo.epizy.com/what_is_arcane_focus.pdfIn PDF document text
    • http://bizedesaxifu.onlinewebshop.net/ap_grama_sachivalayam_results_merit_list.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/jogakakizemegil.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/applications_of_derivatives_in_real_life.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF18 5456 bytes
SHA-256: 77589c7b7ac28340f91e9ff12a78445f903191257863886fcf340631561c9fed
font_01_sfnt_off00010181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10181 11036 bytes
SHA-256: 37159e07357face2b8347edf19eef4988ec6bb49742dc8792f9a399ef1a26c92
font_02_sfnt_off00012774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12774 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848