Malicious PDF — malware analysis report

Static analysis result for SHA-256 36d02732d38e8c7c…

MALICIOUS

PDF

72.6 KB Created: 2021-05-06 18:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ef2b662dd9270ea46379fc15eb99f431 SHA-1: 99a9b2e0314362e2769e9e76ab19496f1d777ade SHA-256: 36d02732d38e8c7c67b1ac8a86cc917b5dccd8a83173ece5faf5af8b32b606f2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://xezojetit.ru/strik?utm_term=2017+evinrude+25+hp+etec+reviews PDF link annotation
    • https://wigimosasalak.weebly.com/uploads/1/3/2/8/132814057/tekajobidegezos.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/anno_1800_tipslzc30.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/best_introductory_law_booksq0v5d.pdfIn PDF document text
    • http://wugegifa.getenjoyment.net/application_form_sample.pdfIn PDF document text
    • http://tifusavegapawuf.mygamesonline.org/radubenukufom.pdfIn PDF document text
    • http://yewes.fun/91228975031lv2kc.pdfIn PDF document text
    • http://fruit-ital.space/sarkar_3_full_movie_watch_online_freuu962.pdfIn PDF document text
    • https://pafutidosuzov.weebly.com/uploads/1/3/5/9/135989867/rodijepukasugura.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/is_william_afton_scraptrap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bcdd7a9-abf9-4eef-a1d7-72c2125a67c0/why_doesnt_the_brush_spin_on_my_roomba.pdfIn PDF document text
    • https://5902ff30-e651-486c-ac37-3e8383bfa78f.filesusr.com/ugd/f35da0_da3965d7f00d450b99b600f87f80c3a0.pdf?index=trueIn PDF document text
    • http://xawiwevivuzox.onlinewebshop.net/ketofigapupoziw.pdfIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_152c97a91e244493b402b7fe5c299c07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widetunipet/lindt_chocolate_balls_nutrition_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd52e86-b21d-4dbf-b213-b209231c0ea0/etapas_del_proceso_de_investigacin_cientfica_con_enfoque_cualitativo.pdfIn PDF document text
    • http://davinawoguzag.atwebpages.com/what_are_some_core_strength_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/does_costco_fix_computers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1585bff3-7c80-41fe-87c2-c97321b0c905/what_are_good_lenses_for_portraits.pdfIn PDF document text
    • https://63d876aa-455f-4c41-9c38-50747f3e0b95.filesusr.com/ugd/a220d5_5d12f10086bb4f14a94c02e0ef446fdd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c20d203a-0b1f-4536-8aca-6ec116b1dc4e/modal_verbs_list_in_english.pdfIn PDF document text
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_dfa651b9008a40158346b6dd62911358.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9302e7c4-43be-46c8-a2c3-c6c92aa15d35/87883930429.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_off0000dd53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD53 5508 bytes
SHA-256: 771ae3d03a9b1a20649537bd462f7338e83d729d6311bb7ea74e72585280ffad
font_01_sfnt_off0000f034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF034 10828 bytes
SHA-256: ffe191a9f3ee12bb849f7e17088eea234632f2e9a78b69c3139a7db6e1029d3a

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