Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c04e5c4989ad062…

MALICIOUS

PDF

82.9 KB Created: 2021-03-18 20:19:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e524a2bdedee88304c25a7fcca179360 SHA-1: 4ec8fa33c3506f2800ddefcbfecc24c693525dde SHA-256: 8c04e5c4989ad0629831418f8d4195661d6b25fc628953ace0e201dab5f6e404
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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 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.
  • 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://zajinet.ru/strik?utm_term=edgar+allan+poe+complete+tales+and+poems PDF link annotation
    • http://paxabak.mypressonline.com/vojabadesukabigagagugop.pdfIn PDF document text
    • http://mevixonur.mywebcommunity.org/list_of_aluminum_alloys_and_properties.pdfIn PDF document text
    • http://nusowutevu.getenjoyment.net/hayward_ecostar_drive_error_pump_stalled.pdfIn PDF document text
    • https://nufujemirifo.weebly.com/uploads/1/3/4/8/134868255/zuwoge.pdfIn PDF document text
    • https://wemawamirake.weebly.com/uploads/1/3/5/9/135959397/2521427.pdfIn PDF document text
    • https://kuvanipugeva.weebly.com/uploads/1/3/4/4/134445248/zoletopog_xitad.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/wexukufedepim/grid_template_columns_in_css.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a411b09b-03f8-478a-9775-adcc11f7f4d9/where_do_you_check_the_power_steering_fluid_on_a_2011_buick_enclave.pdfIn PDF document text
    • http://vivetusukuv.onlinewebshop.net/understanding_and_using_english_grammar_third_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc475cff-1690-4e3a-a032-96f4ea9f8407/the_man_in_the_high_castle_book_vs_show.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/847c8ee5-cf3d-43d0-8e9d-c5b8541eac45/dd_2nd_level_wizard_spells.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/9380628460.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/14239286066.pdfIn PDF document text
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_96d73943b98c4a93b1db9a71f4b0ebbb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/jawomosifomuwuzom.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/pubg_lite_pc_hack_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/87903156884.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/78030918078.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/picture_editor_apk_for_android.pdfIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_e0bce6707ad143818c147ad72326855e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a2cacda-2581-4dde-92d4-05d0a146dd9d/midugeganakimitutukimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38fcc8f9-7d92-4f81-bb57-3bfb73ae7673/pokekanivasuf.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_off0001048c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048C 5348 bytes
SHA-256: 8d82443182f1fc5f8c230771dcca8a2d5461603408a48ea6fc9fc69dd6a61115
font_01_sfnt_off000116ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AC 11652 bytes
SHA-256: 25d8ee79ea16e27781fe0479ac7c48f6389ddec6137bf0d9c48a3a808da8e5cb

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