Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed55f04e8e1e8ad…

MALICIOUS

PDF

79.4 KB Created: 2021-05-17 14:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7cc97462fade2ecd1066c7b2840627da SHA-1: 2ec29e3c402a1c93f0eb12aa9841b18be2008f40 SHA-256: 5ed55f04e8e1e8add5aed4b0d9052f2917edeb371eb77583b913baa20e484dd7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, a common tactic for phishing or distributing malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a link farm structure, and the ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs suggests the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://druttle.ru/strik?utm_term=mackie+808s+mixer+used PDF link annotation
    • https://cdn.sqhk.co/xufatirumina/djjcBFV/kiviro.pdfIn PDF document text
    • https://cdn.sqhk.co/fimirexuf/ihhaqif/origami_heart_valentine_card.pdfIn PDF document text
    • http://kejumazinanu.mywebcommunity.org/1381848519.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/the_book_of_secrets_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/boxewemutox/sjigijO/kowekemuxusizafoda.pdfIn PDF document text
    • http://sotipidikukunow.getenjoyment.net/vatuzipeputamu.pdfIn PDF document text
    • http://sigixexizo.sportsontheweb.net/clinical_anatomy_of_the_eye_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cc60534-d77a-41bb-b431-0c0edd91934c/runinafikolosixefibigol.pdfIn PDF document text
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_c418ac8360bd490586c79cbe3f30b9d6.pdf?index=trueIn PDF document text
    • http://dafukip.myartsonline.com/apeman_a77_manual.pdfIn PDF document text
    • https://b998fa74-583e-446a-a2a7-67f41460fdb2.filesusr.com/ugd/e081f8_70399b8347444b72ba6f0a59bf9846f0.pdf?index=trueIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_42a0aa934779464b8b4ed8ccb7b89145.pdf?index=trueIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_e1635336af714879b324204b2c61f2b5.pdf?index=trueIn PDF document text
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_ef025d18e61e42ec95127af673a82688.pdf?index=trueIn PDF document text
    • https://2aa0b900-127f-4603-a19a-6a731d3c9eb1.filesusr.com/ugd/5eaffa_c99af95a254a4135aefe1c1cb4e2c160.pdf?index=trueIn PDF document text
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_f6874ec765c140e59a2587e4f0d9ebba.pdf?index=trueIn PDF document text
    • https://4095172d-bd2f-4181-91d7-dd424e653400.filesusr.com/ugd/df73ab_6915e8507f3a4f61a4fa0fd8ee62d54e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c9431d-a305-4e20-8501-f8ea9abf474c/8627234022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08a295c8-9a58-4e59-b288-64f011c8c892/nufivoluzutijesokilof.pdfIn PDF document text
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_c4df9800d1634229bd411046873b85d9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c4caec-97ff-4edc-84c3-85fb5d5aacdd/danby_designer_2.6-cu_ft_freestanding_mini_fridge_white.pdfIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_cd698559324a40299dd73b3b81d3c2a0.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C3 5528 bytes
SHA-256: f1aaa621fac49eb6a9b81f7e89ee67eec691a2e729ca03d7b98ab5e47d759dee
font_01_sfnt_off00010985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10985 11388 bytes
SHA-256: fc4beda4bf2c770494766480ca66c6e1df17fe85dd06e70a4544fd67174d3702

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