Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd676baa045389e…

MALICIOUS

PDF

83.7 KB Created: 2021-03-15 22:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 00002fc29ede1929a01144216322de42 SHA-1: 70826ba49ba90cdc0faf57cfd224bd49f0201c0d SHA-256: 7fd676baa045389e567e8989ca12388fe767ef63902c56f300ce19d56d1fa6fc
186 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, a common tactic for phishing or distributing malicious content. The primary malicious URL identified is https://mezovuduw.ru/strik. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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.
  • 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://mezovuduw.ru/strik?utm_term=what+reading+level+is+the+hiding+place PDF link annotation
    • http://loduwij.scienceontheweb.net/adjective_phrase_exercises.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_a9f57e140d1a4941b16c09821dcb07db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/somamere/22019832249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/810b16fb-7496-44f2-80af-61549594f629/jbl_flip_3_stealth_edition_specs.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_9d49987c4736473b8307d6399eb8879c.pdf?index=trueIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_889ff18213a84138bbcf04ef2ffe1ee8.pdf?index=trueIn PDF document text
    • http://kapirexazi.onlinewebshop.net/what_do_millionaires_think_about_poverty.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/guidecraft_step_up_kitchen_helper_instructions.pdfIn PDF document text
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_01a7ddcd296e49cb858a27067ce0af18.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c142da-56f6-4830-b5fc-c5d21b23cc31/77854136306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be57933-a166-47d6-a52c-ab237b2995f5/skyrim_se_best_weather_mods.pdfIn PDF document text
    • http://fajenadiwizowo.atwebpages.com/java_ee_spring_spring_mvc_mybatis.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/animal_life_cycle_worksheet_5th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be8ad578-39af-4576-b34a-5e2a6865c2de/dadura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26c895ef-4c7e-4808-9b18-34395b79fe02/todadanuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9ded645-4204-467e-89fd-44318928cbf0/64665084365.pdfIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_54e1f9d8975b44c395c27316b26ee204.pdf?index=trueIn PDF document text
    • http://tobikinos.onlinewebshop.net/nys_drivers_license_renewal_extension.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f411827-029a-480d-ad94-c7d6d13bb177/nerepegikoxojejulomol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8593454-f8b3-45cd-a2a6-902c182b66d5/76630871125.pdfIn PDF document text
    • https://ab38f0b8-b274-4020-91f3-e6554b072184.filesusr.com/ugd/9c43ec_1fec2ffbef3448bebda9c79b6e5166ec.pdf?index=trueIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_a74e47fa47434be388df6c2c3e40c225.pdf?index=trueIn 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_off0000ff8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8F 5408 bytes
SHA-256: 74d4f7172f2e1f3423d37474d77c5536fbd4fb928c82f5d4eb439c7130d77046
font_01_sfnt_off000111fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FD 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00011a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8B 11044 bytes
SHA-256: fa73c930d93d4a174579f26b539c42f1d177b028ec650e6d2e3afe970be8334b

Open this report in the interactive analyzer, or submit your own file for analysis.