Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cefdf16c0d0aa52…

MALICIOUS

PDF

74.6 KB Created: 2021-04-02 13:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1106c7a3b93eebf9f7a26bfa9f54d364 SHA-1: 5adc8c1d72613da66a8b2a8b24f83e5c0ffb20a9 SHA-256: 5cefdf16c0d0aa52c18a2e22ab8981ded71bec49e0a28457f43743dedc7e2ed3
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 0.9991

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 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://ponafet.ru/award?keyword=halimbawa+ng+bionote+sa+filipino+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411935/normal_5ff2f1c56c0cf.pdfIn PDF document text
    • https://cdn.sqhk.co/subesanodag/BDjijih/sandwich_king_lowell_ma.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/jdGTign/crazy_zombie_6._0_super_heroes_hacked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414167/normal_6046782242db0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498882/normal_6008eb11802ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427105/normal_605f54369da0e.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/thhijST/43328777831.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/cuhagfj/69793451510.pdfIn PDF document text
    • https://cdn.sqhk.co/fezusife/didSsij/lanitumok.pdfIn PDF document text
    • https://letonezesuju.weebly.com/uploads/1/3/1/3/131383444/zujawok.pdfIn PDF document text
    • https://cdn.sqhk.co/piwoputi/eifFqgi/ayo_and_teo_reverse_moves.pdfIn PDF document text
    • https://junenewawaxi.weebly.com/uploads/1/3/1/4/131407408/9c19d30938d.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/vhehfRS/83761942598.pdfIn PDF document text
    • https://vegekonewipure.weebly.com/uploads/1/3/5/9/135964828/begiz_kusisijufadizuf_witodokebadip_ganulirap.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikagisato/dhGYii7/63876605244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_60595174e13cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f1c9485-540e-4ca6-b4ca-c318d4b105e9/the_100_books_by_kass_morgan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e013c81-c074-46df-ad98-b9b9db09231d/can_you_renew_your_food_stamps_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1562841e-b5c3-45d3-a9c3-b47eca3f871c/what_is_the_clean_button_on_cuisinart_coffee_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f411573-4695-4eaf-8589-3706c93928ad/how_to_use_samsung_dishwasher_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b2099f0-e7c1-4070-82cb-1f1ad45b435f/rifts_sourcebook_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efcc8cc4-1225-4f86-8570-581d95f9e49b/how_to_turn_on_jazzy_select_elite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f6d2e74-32b1-478d-94bb-37724fc53057/how_to_stop_the_habit_of_biting_nails.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f60ffb-be41-496d-99b7-5822b091b8da/aprende_ingles_gratis_desde_cero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d3fa7fe-4649-4680-a57b-f9cef62eb4cf/gutilamepuko.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_off0000e58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58D 5460 bytes
SHA-256: 23e937128fd60a635a336c74b1637826c06607eb3694e50d9be66818cf3612d2
font_01_sfnt_off0000f81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81B 10824 bytes
SHA-256: 5e412afd454909be2e486f4ae52f985c19f60c3d5a0d1a56610a9f094216da38

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