Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae79ac28be18eb1…

MALICIOUS

PDF

69.9 KB Created: 2021-04-04 08:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d54440c061d6004ba071f506454e326d SHA-1: 700cec30f3b5403753b552c609d1f0f2b71e88f0 SHA-256: 6ae79ac28be18eb11c0e9afd915162f4ecc57966579dc82f2ba30d7959428be3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://dugedepap.ru/wix?keyword=watch+dogs+trainer+megagames PDF link annotation
    • http://xoxanuf.mygamesonline.org/how_to_annotates_in_evernote.pdfIn PDF document text
    • https://tugoxovelosiju.weebly.com/uploads/1/3/0/9/130969774/jazumebuxiko.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/97381807813.pdfIn PDF document text
    • http://tapodozinojet.mypressonline.com/4681179638.pdfIn PDF document text
    • https://cdn.sqhk.co/faxenukev/ghgSibN/monkey_racing_mod_download.pdfIn PDF document text
    • http://diluzadumavotux.getenjoyment.net/application_letter_sample_for_fresh_graduate_accounting.pdfIn PDF document text
    • https://pozufijuxib.weebly.com/uploads/1/3/0/7/130775557/kujabezob.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/36949833133.pdfIn PDF document text
    • http://jilavixit.medianewsonline.com/zulosifimetebapemufovupi.pdfIn PDF document text
    • https://cdn.sqhk.co/xekawiba/c5jj5Cw/color_therapy_coloring_book.pdfIn PDF document text
    • http://zonitupupafof.sportsontheweb.net/abdominal_exercises_for_beginners.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/paxiluv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bifovigavij.myartsonline.com/business_intelligence_planner.pdfIn PDF document text
    • http://sufixis.myartsonline.com/kelas_cestoda.pdfIn PDF document text
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_1000f336d12d476396e085f443c109df.pdf?index=trueIn PDF document text
    • http://romepasuv.myartsonline.com/coindesk_state_of_blockchain_q2_2020.pdfIn PDF document text
    • http://rizivubonulej.atwebpages.com/its_called_a_breakup_because_its_broken.pdfIn PDF document text
    • http://kavezusi.onlinewebshop.net/dupasusu.pdfIn PDF document text
    • http://dezobod.onlinewebshop.net/coastal_geomorphology_book.pdfIn PDF document text
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_de3761bcdf4b40b6b7bdc34f43fa9864.pdf?index=trueIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_1b7b7fcbc66e43d085528d73b86b3743.pdf?index=trueIn PDF document text
    • https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_eef1380a4f5b404a9c3cfea9393df135.pdf?index=trueIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_f4226fd5ab854e8b9c9c8d3e62bf6690.pdf?index=trueIn PDF document text
    • http://zekezixurul.onlinewebshop.net/download_free_autobiography_books.pdfIn 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_off0000d510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD510 5336 bytes
SHA-256: d5980908f60707f5fad1fa53d03a8e215046d043ab9b21421b19fa4e6faca5b5
font_01_sfnt_off0000e718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE718 10224 bytes
SHA-256: 4a6ad1c0a9a17f87d4bc4c3c47c904d12bee3378f3533921d2d0aefb1b52aec3

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