Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1cda7dc88a442dd…

MALICIOUS

PDF

81.2 KB Created: 2021-03-10 20:22:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75dbc197d782c66481335469897be843 SHA-1: d6dd0c879159f9973fe965b69dbae24c1730dd61 SHA-256: c1cda7dc88a442ddae2983909a645dd68cc5842ee529a46b5269720314e313eb
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with one primary malicious URL pointing to 'lozipotod.ru'. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the nature of the link farm suggest an attempt to direct users to potentially harmful sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/strik?utm_term=casio+w-800h+watch+strap
    • https://cdn.sqhk.co/jawuraxexije/ia5ljhi/34223629841.pdf
    • http://mufutekuson.getenjoyment.net/what_ink_does_hp_deskjet_1000_use.pdf
    • https://cdn.sqhk.co/tibidimewako/ijajgji/affidavit_of_birth_form_in_zambia.pdf
    • https://static.s123-cdn-static.com/uploads/4487935/normal_5ff03e462225b.pdf
    • http://tamakedesununod.mywebcommunity.org/house_of_night_book_series_for_sale.pdf
    • https://cdn.sqhk.co/vopupevomate/cgeidge/ping_pong_the_animation_full_episodes.pdf
    • https://cdn-cms.f-static.net/uploads/4384296/normal_602edb50d29ee.pdf
    • http://nitiwopororotef.mypressonline.com/how_to_clean_shark_lift_away_deluxe_vacuum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/7e05df28-f684-46bf-b26c-1409ca6ac3ad/what_are_idioms_and_examples.pdf
    • https://s3.amazonaws.com/dalava/word_formation_derivation_antonyms_and_synonyms.pdf
    • https://s3.amazonaws.com/mosezavor/verizon_fios_modem_router_upgrade.pdf
    • https://uploads.strikinglycdn.com/files/c92e54ea-7a51-4d22-b65c-571b7be14206/sat_reading_passages_tips.pdf
    • https://s3.amazonaws.com/wapabefizosumi/proxy_vote_form_free.pdf
    • https://s3.amazonaws.com/wonumafubij/wagisewa.pdf
    • https://uploads.strikinglycdn.com/files/fe46a903-3de4-4d85-9d7e-03efbea9bce6/mechanics_of_machines_cleghorn.pdf
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_78c931ee6cf246d3beba4462661d64ad.pdf?index=true
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_b9f6eda29061404e8ad7b76298468ee3.pdf?index=true
    • https://s3.amazonaws.com/widuxade/skf_linear_bearing_catalogue.pdf
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_c4fa422cf3a842fb9065558a855d3829.pdf?index=true
    • http://lejiletuvasipib.onlinewebshop.net/3188628331.pdf
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_b7c1802732c240f9ab8fbd2468a527d1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/05432f5c-74c4-4b76-be50-7c03102cfb36/how_to_install_rear_seat_club_car_precedent.pdf
    • https://uploads.strikinglycdn.com/files/22889955-8abd-4feb-b3fc-d31cbc1b7c6e/46554240469.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f382.bin
4ee4327b33a8059b966b724521fdc64f8a392d426fec00bab206b68a7fac8314		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF382 5036 bytes
font_01_sfnt_off000104c2.bin
9668ffb5cd39f8908e9ea43bbf0a35f65147011a8f1d1376bc35850682c4ebb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104C2 10800 bytes
font_02_sfnt_off00012937.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12937 4324 bytes

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