Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc8ebd7e89d573ff…

MALICIOUS

PDF

76.5 KB Created: 2021-03-15 05:12:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6967d081491a2de9ae761eecd03d0b9b SHA-1: 9d4b1da9b1d026c2ba9f0fc8e6159102b54c3eb8 SHA-256: cc8ebd7e89d573ff9c95bb4e492c37dc3f662b83cb65132ef329b00967697c60
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags the document as a link farm on disposable hosting, reinforcing the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=what+are+the+three+levels+of+organizational+culture PDF link annotation
    • http://sufawevugut.mywebcommunity.org/books_like_what_i_was_doing_while_you_were_breeding.pdfIn PDF document text
    • http://rodisawikikofu.medianewsonline.com/wexopituzipuwajivuguj.pdfIn PDF document text
    • http://wixujikubipom.mygamesonline.org/data_structures_and_algorithms_in_java_michael_t._goodrich.pdfIn PDF document text
    • http://vevufilusik.scienceontheweb.net/rekikiwasorutojemovi.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxeromewime/bGjhjdo/12343408481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414871/normal_6016fc25b50f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480898/normal_604666dcb1930.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/best_star_map_for_ipad_free.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/tiwuzilafuxajenanaxuta.pdfIn PDF document text
    • http://pewodebepefawi.scienceontheweb.net/dadig.pdfIn PDF document text
    • https://cdn.sqhk.co/fetedudi/cjjWOij/teddy_bears_picnic_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_601a62d97b36a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zelibigevuloxuj.epizy.com/cellular_pathology_an_introduction_to_techniques_and_applications.pdfIn PDF document text
    • http://kigaxaxoguwebu.rf.gd/can_a_school_fine_you.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0a2522-122f-43bc-951f-ada3a683f5f7/what_is_the_meaning_of_out_of_sight_out_of_mind.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c46660c-2d8b-4111-9ae7-735a7943fde1/30526131293.pdfIn PDF document text
    • http://kaloruligot.onlinewebshop.net/nutrition_sportive_musculation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eab29fd1-8db6-4f58-9646-78f118f9fb61/regebofelakuzuxawi.pdfIn PDF document text
    • http://duvodix.myartsonline.com/canon_80d_instruction_manual.pdfIn PDF document text
    • http://davinawoguzag.atwebpages.com/48171217831.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_off0000ed1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1F 5268 bytes
SHA-256: e6e2fc88283969f1a5f6e73aa4377337b1dd4e2d88feb0ebfd5cf7d669c4ba24
font_01_sfnt_off0000ff22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF22 10708 bytes
SHA-256: 60078ebfac8d45b11e1b47cc51bba40bf34055970a31a2e7ed9cb37a26d0181c

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