Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0cbcc7978ade49…

MALICIOUS

PDF

93.3 KB Created: 2021-04-20 06:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f14d029b464a65dc1149a19a87cce2f SHA-1: 772c81181d1a0de9e8e5a7ff4398971b5c0fb4f9 SHA-256: cc0cbcc7978ade49c0343654411b85adb608aa595e223de73f535e7e394dfd15
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term_redirector=True' and the nature of the URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/strik?utm_term=are+percy+jackson+books+good+for+adults
    • http://fikakutipid.mygamesonline.org/face_to_face_interview_definition.pdf
    • https://static.s123-cdn-static.com/uploads/4447271/normal_6000c82ca5ea0.pdf
    • http://dokakepitizix.medianewsonline.com/company_profile_template_sample.pdf
    • http://zusiwibewire.mypressonline.com/hp_laserjet_100_color_mfp_m175nw_printer.pdf
    • http://sepozimog.scienceontheweb.net/ultralight_aircraft_design.pdf
    • http://bosemefawixuwov.mypressonline.com/hp_probook_6560b_wifi_drivers_windows_7_64_bit.pdf
    • http://mawosatejojeka.sportsontheweb.net/8051_assembly_language_programming.pdf
    • https://bejeselujolir.weebly.com/uploads/1/3/1/3/131379719/fikimosukex.pdf
    • https://cdn-cms.f-static.net/uploads/4417122/normal_60433a787fb45.pdf
    • https://paninopuj.weebly.com/uploads/1/3/0/7/130739529/xurisufiti_sagun.pdf
    • http://veviwumifuvemuz.mypressonline.com/effective_written_communication.pdf
    • http://xiwupulo.medianewsonline.com/modafanitosu.pdf
    • http://juzufezike.mygamesonline.org/konsep_askep_bronkopneumonia.pdf
    • https://kazubuxupopa.weebly.com/uploads/1/3/2/6/132696048/pisazevanawibo_wosurugofusibid_fadifepa.pdf
    • http://zipubezexupoka.mywebcommunity.org/isometric_projection_tutorial.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/89ce9420-94f9-4c30-8e35-7cb0aa4a40f8/the_game_of_life_vintage_bookshelf_edition_rules.pdf
    • http://pujumek.myartsonline.com/xofanawif.pdf
    • http://todifisafi.atwebpages.com/developing_basic_digital_skills.pdf
    • http://mifojizu.myartsonline.com/jowogesolanuj.pdf
    • https://uploads.strikinglycdn.com/files/579f96fb-ec12-4cfb-b596-12ead3f9eafb/do_rv_refrigerators_run_on_propane.pdf
    • https://uploads.strikinglycdn.com/files/c6f19842-db48-4776-9cc0-1747eb5e75e7/dofixovuvimopogugoperu.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_off00012f16.bin
8d860189164cb39d19e442fc8443c9965a9b2bbb0cc3ad87a883d8d170c7b4a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F16 5692 bytes
font_01_sfnt_off00014297.bin
2f62d45ff1a6b85d2e4d7206948b46e85001a77bc2ca7079909c1232487bffbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14297 10464 bytes

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