Malicious PDF — malware analysis report

Static analysis result for SHA-256 c909e8c4d891f51b…

MALICIOUS

PDF

80.8 KB Created: 2021-03-14 03:29:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f9352d63021b00aa07331af6db599be2 SHA-1: b0eb88721947af83abcf33ae50bfc20c77c708f3 SHA-256: c909e8c4d891f51bb589d83178aa1deac91b052057a828c08a530d6a2974f99d
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 0.9993

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://crophysi.ru/123?utm_term=general+comments+for+report+cards+preschool PDF link annotation
    • https://cdn.sqhk.co/wanoziku/wAibwob/skate_art_3d_game.pdfIn PDF document text
    • http://apelsins.space/kupiva7mq2l.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/fhbhgij/8588670837.pdfIn PDF document text
    • http://kersita.space/tugisid0e9y1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378855/normal_6034e19064422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381541/normal_604a305d6c760.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/Hwhaagg/deserted_island_survival_game_online.pdfIn PDF document text
    • http://kapovulup.mywebcommunity.org/timilanepazuxafimelewi.pdfIn PDF document text
    • http://prizinsta.info/automatic_clicker_ios_apkng5zq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383917/normal_5fd0f00046fca.pdfIn PDF document text
    • https://cdn.sqhk.co/neliwuwo/hehggin/22507497994.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/does_osha_require_employers_to_pay_for_hard_hats.pdfIn PDF document text
    • http://bapulesaj.mygamesonline.org/6499252673.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/95992225762.pdfIn PDF document text
    • https://cdn.sqhk.co/zazavoxujub/KBIiifO/banner_designer_pro_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_38f342272c2c4627babb61a62e0de25e.pdf?index=trueIn PDF document text
    • http://josuxak.atwebpages.com/lnmu_bsc_part_1_zoology_syllabus.pdfIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_c4bb1f7ab83242afb36f4e4ecddd8f42.pdf?index=trueIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_44e624857dd94e69ac6314fa36af036a.pdf?index=trueIn PDF document text
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_55ab830c712f410fbeb94784ef7fb613.pdf?index=trueIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_d9a22eba4a924bc78ff6aed1933e4e70.pdf?index=trueIn PDF document text
    • http://milebulijulami.onlinewebshop.net/capillary_electrophoresis_agilent.pdfIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/dutch_grammar_cheat_sheet.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10027 5428 bytes
SHA-256: 8c963f32b0d1172bd17037d4f4cbc5c078f3e1772fd7c730ca7eab3eb57b469d
font_01_sfnt_off0001126e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126E 10260 bytes
SHA-256: 305c4d184f4944411189adb5abbc1bff53b5d1367ef829f18f107979d20a4bc6

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