Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf3d3cf353abdd4…

MALICIOUS

PDF

73.9 KB Created: 2021-03-15 07:20:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b70cf6b8591ace050594b18bd58ac44 SHA-1: b031d972a0d6e1a0a764daae5f8f9c08f41ceb9a SHA-256: 0cf3d3cf353abdd4a04d9034f840dbc2ded69ea6573ff1df06c702b1b3ffd8cd
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one pointing to 'vilenefex.ru', suggesting it acts as a lure to a malicious site. The PDF structure and embedded links are indicative of a phishing or content-luring attack, potentially leveraging embedded JavaScript to facilitate redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=an+everyone+culture+summary+pdf
    • http://xobilosusi.sportsontheweb.net/american_criminal_justice_system.pdf
    • https://donedujawag.weebly.com/uploads/1/3/4/3/134315137/7642475.pdf
    • https://cdn.sqhk.co/bitowiso/hbaGja0/57900724230.pdf
    • http://rakuxijewimafud.22web.org/13548293948.pdf
    • http://pusovemolexed.scienceontheweb.net/schwinn_bike_trailer_setup.pdf
    • http://lezeninimi.medianewsonline.com/58015808610.pdf
    • https://nonuradijo.weebly.com/uploads/1/3/1/4/131406562/lepuravadaxik_vuxujukik.pdf
    • https://vibejatixulaxa.weebly.com/uploads/1/3/4/1/134131444/7a7da5ec.pdf
    • https://cdn.sqhk.co/pupevadojas/KqRjjid/mazuzipugegimumewesi.pdf
    • https://ganokupojedozo.weebly.com/uploads/1/3/4/8/134890080/susitepap_sofofaga_mirasevijusat_lemaso.pdf
    • http://damewumesigalut.medianewsonline.com/analytical_geometry_grade_11_caps.pdf
    • https://xunopigiwigon.weebly.com/uploads/1/3/1/6/131636761/6604498.pdf
    • https://cdn.sqhk.co/totimujid/idhV88J/22029564680.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_b1d7598ed8414b2f8d7e3e6ab508efa9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/417c4240-dcf2-4807-beca-8b0ae20e9059/schwinn_fitness_promo_code.pdf
    • https://uploads.strikinglycdn.com/files/22d665e7-1dbb-4e9c-8826-f4e65b043d99/how_much_does_a_speed_queen_commercial_washer_cost.pdf
    • https://uploads.strikinglycdn.com/files/f48030e7-ab76-44aa-b042-b3c22b8f863a/what_is_a_caring_person.pdf
    • https://28a90398-13b1-4b58-b54c-ed045a6bddf2.filesusr.com/ugd/7e9e1f_d22a333bf8e94fd59aa9a3d6d5aa0da7.pdf?index=true
    • http://rokumezex.epizy.com/cracking_the_pm_interview_book_free_download.pdf
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_cc78cde5dc584f85984b9ffe685bdee1.pdf?index=true
    • http://zovameden.rf.gd/52465892794.pdf
    • https://d67926d6-99fe-48a4-938f-95006fdf2de6.filesusr.com/ugd/21d82e_044d4c10d91c40c08c83cfe48f6c34e3.pdf?index=true
    • http://pigutun.myartsonline.com/kogajofimele.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2f3.bin
f4f1bd424853a33424dc62acb63af3705b868fd4e2e5d54d4b1f98972371693c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F3 5452 bytes
font_01_sfnt_off0000f579.bin
1d8656f1ceb218f0832dbbd5f0525ef05d28df3709ca22318b02bffa13c8feb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF579 10212 bytes

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