Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea0ba8da9779cbd…

MALICIOUS

PDF

76.0 KB Created: 2021-03-19 12:43:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f21a3ba6dbde8985c81cd1dc4cbc3c94 SHA-1: 216e091c44e4017b00005367b9456464fe6b27d8 SHA-256: 8ea0ba8da9779cbd304696a7c80283930caa9719d1bcf116fc5ac263157b8a57
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 0.9997

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 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://jacksth.ru/wix?keyword=super+symbiosis+question+and+answers PDF link annotation
    • http://wurogutevifo.iblogger.org/silajavek.pdfIn PDF document text
    • http://zaximudetebase.iblogger.org/hypercalcemia_treatment_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/buwozumu/cicggdO/parallel_universe_4_hero_free.pdfIn PDF document text
    • http://goodik.fun/game_of_thrones_cast_season_3_episode_43akwv.pdfIn PDF document text
    • http://regsenatvumen.website/tp_link_nano_powerline_adapter_starter_kit_av600_review1gy8g.pdfIn PDF document text
    • https://cdn.sqhk.co/wolonevavaru/waIqmie/lebara_new_sim_card_same_number.pdfIn PDF document text
    • https://cdn.sqhk.co/soredepel/chfv8fd/hide_and_seek_maps_fortnite_codes_mansion.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/O0Hjfia/sunshine_house_south_centennial_avenue_aiken_sc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387921/normal_5fc7d1f1e5450.pdfIn PDF document text
    • http://pro-komp-master.website/core_vocabulary_approach_speech_therapyrr8ui.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_60390fe1397d7.pdfIn PDF document text
    • https://cdn.sqhk.co/vezukefuza/iglg7jb/bewelofaku.pdfIn PDF document text
    • http://disconto50.info/signed_first_edition_of_peter_and_wendymdpx0.pdfIn PDF document text
    • http://chategratis.online/my_friend_cayla_doll_app_iphone7enky.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/cd20942f-48d5-4ec7-9d8f-5f7c9b656bcf/how_to_prepare_for_a_social_work_masters_interview.pdfIn PDF document text
    • http://diwejijozijigez.rf.gd/how_many_books_are_in_the_dog_man_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f81b01a-6d20-4957-a4ce-58490132ca4e/how_to_turn_on_nintendo_switch_with_pro_controller.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/63981802609.pdfIn PDF document text
    • http://riwugenesujo.epizy.com/a_level_economics_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/emergency_medicine_clinical_guidelines.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_off0000e9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BE 5636 bytes
SHA-256: 61093441bb8a44465498eb0c313cadb41e0654e63e364140191fd056007b2462
font_01_sfnt_off0000fcdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDB 10584 bytes
SHA-256: e5fc876d206df6a1b48cd659aaa3406e67802b8edbcb50c1629535d6ef9af42f

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