Malicious PDF — malware analysis report

Static analysis result for SHA-256 680f6e97eb3241c4…

MALICIOUS

PDF

75.5 KB Created: 2021-03-22 21:37:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a8c9f2a2513b116eab80c7a22b8f14da SHA-1: d49d4ecde888713c4184404512c08a86b261e0fe SHA-256: 680f6e97eb3241c488d858eba575decb459c3e57fc45b4402d9a2017ed9ad895
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting it is part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The document body, though partially corrupted, indicates a lure related to a movie parent guide, likely to entice clicks on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=burning+bright+movie+parents+guide PDF link annotation
    • https://kavirozix.weebly.com/uploads/1/3/3/9/133999962/xinewagetadosir-dotesejifeni.pdfIn PDF document text
    • https://cdn.sqhk.co/fegibidizog/gcjf7jc/suwupetiwikolovofafokozam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365586/normal_5ff0c978d7e83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5fdc781cc8200.pdfIn PDF document text
    • https://samabuwe.weebly.com/uploads/1/3/0/7/130739499/1c2d795b2f.pdfIn PDF document text
    • https://jifalefowa.weebly.com/uploads/1/3/4/7/134733665/lenolimokeb.pdfIn PDF document text
    • https://nosozekime.weebly.com/uploads/1/3/4/6/134634018/3a2244b2.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/yUjhOie/kidafodalatariforinoporeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fac30f9c-1bc3-4ff6-ac40-7ced1d2a170b.filesusr.com/ugd/3b7182_e472fdc01f2b49579b5729995722acfc.pdf?index=trueIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_81da6e0d73054da29423821b7944fcb5.pdf?index=trueIn PDF document text
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_cb915b20d1744b78b6cd18176a877eeb.pdf?index=trueIn PDF document text
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_0aad1855081641efa458451400a029b6.pdf?index=trueIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_4d7668cfcfb74ac5b0bad546515e0210.pdf?index=trueIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_ad5ba87dd0aa49599afa5048648b509b.pdf?index=trueIn PDF document text
    • https://84d655c4-d84a-4a0c-9c32-0387925bd622.filesusr.com/ugd/6233da_4bf0704564904d939879ef9e1f62cf55.pdf?index=trueIn PDF document text
    • https://d67926d6-99fe-48a4-938f-95006fdf2de6.filesusr.com/ugd/21d82e_c2afae2d48df4a55a1c3a71edccc9ceb.pdf?index=trueIn PDF document text
    • https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_8e490abbd39e4e8eb21508192ce8ea41.pdf?index=trueIn PDF document text
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_959f0c97a23d4a729ee31fc6ccce96cf.pdf?index=trueIn PDF document text
    • https://536432c6-7160-4795-b32c-faef63afc1c8.filesusr.com/ugd/5e2347_a470e4f6536241cfbf221f9c4d4bc7a9.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_off0000ea6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6F 5592 bytes
SHA-256: 1c13183a8274614a4345110bf874e6e7ecb711a3a70d301c50f9e3e0efdc805e
font_01_sfnt_off0000fd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD45 10416 bytes
SHA-256: b610844adc119e101672df02f28002e9ca84eb3990a80023218a2f1e62420cba