Malicious PDF — malware analysis report

Static analysis result for SHA-256 160efb38ef9a3ea7…

MALICIOUS

PDF

90.4 KB Created: 2021-03-01 23:57:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 6a98c269fc649de7e063e5f4e1ec53dc SHA-1: 1f69ec4dd565169d6ffaafcfaaafc7e6539f7c0f SHA-256: 160efb38ef9a3ea7cb47ba81ad07bcf04181562fc74ea95496a68c214f82c84d
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a prominent one pointing to 'https://zajinet.ru/strik?utm_term=is+sword+art+online+progressive+finished', suggesting a lure to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and ClamAV detection further indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the document structure and embedded URIs are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://zajinet.ru/strik?utm_term=is+sword+art+online+progressive+finished PDF link annotation
    • http://idclick.cash/repafebawinanekqs2rg.pdfIn PDF document text
    • http://ninotekega.mygamesonline.org/6201919140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472501/normal_6025674d7466f.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/ihbnhca/paypal_account_set_up_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawitaxug/2uhhavV/live_tv_streaming_apps_for_android_tv.pdfIn PDF document text
    • http://remontvorot24.com/flanders_conference_hotel_ielts_listening_answersfiieq.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/ca_real_id_drivers_license_requirements.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_601092d5e0be9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391317/normal_602a38ecbcdc2.pdfIn PDF document text
    • https://cdn.sqhk.co/vilomikov/Xmighih/38661057905.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/i2higrN/knife_throwing_simulator_codes_fandom.pdfIn PDF document text
    • http://dimax.website/how_to_connect_my_bose_subwoofer_to_my_soundbarkg2l3.pdfIn PDF document text
    • https://cdn.sqhk.co/derepinejabi/2Qiflhd/star_wars_movies_timeline_sequence.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477409/normal_60342c1521f8e.pdfIn PDF document text
    • http://zabavnyi-slon.ru/sabekutamutkw2dg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/what_is_the_salary_of_database_administrator_in_india.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/57729133244.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/radhe_radhe_chale_aayenge_bihari_song.pdfIn PDF document text
    • http://pugavidugipiton.rf.gd/55777818633.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/32212252113.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/histology_guide.pdfIn PDF document text
    • http://bokakemipik.epizy.com/nims_is-_200._c_answers.pdfIn PDF document text
    • http://babirusup.epizy.com/wiley_verbal_ability.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EA 5180 bytes
SHA-256: ac4cf177bed5ddd4dcb3ff377f0d4f0fef2c64badd2237eb4f3690050517e8fb
font_01_sfnt_off00012999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12999 10560 bytes
SHA-256: 512e8678062c9252d71803fa83cc636c10d0a97f88b28f7df2821a8e600f1abf
font_02_sfnt_off00014d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D85 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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