Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ac4c43d7b39b35…

MALICIOUS

PDF

67.6 KB Created: 2021-03-20 20:06:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eafd6917e6ab3bbb5ca56b0fa8edd012 SHA-1: 65d3fcad213beba1f6c91d3ae248b8db45ab2b9d SHA-256: d7ac4c43d7b39b3598e67d4cda78fefdd70f64f9163fcb46a6cbc9d7f65037a2
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to external sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8477

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://gimoguvi.ru/aws?utm_term=dulces+mentiras+amargas+verdades+4+pdf+google+drive
    • https://cdn-cms.f-static.net/uploads/4391621/normal_5fd668ab5eadc.pdf
    • https://cdn-cms.f-static.net/uploads/4463287/normal_60476a3fd14e7.pdf
    • http://gikafowezogupij.mywebcommunity.org/business_plan_restaurant_template.pdf
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/7133027c9.pdf
    • http://wijasagasipode.getenjoyment.net/possessive_adjectives_english_worksheet.pdf
    • https://static.s123-cdn-static.com/uploads/4385620/normal_6005a05738d16.pdf
    • https://peruvapi.weebly.com/uploads/1/3/0/8/130813059/b0cc41fb494338e.pdf
    • https://fonekukiko.weebly.com/uploads/1/3/5/3/135393218/tuzes.pdf
    • https://cdn-cms.f-static.net/uploads/4414166/normal_60220820bbc87.pdf
    • http://wuxemit.iblogger.org/47259739959.pdf
    • http://sumomubidisuwo.iblogger.org/combining_form_meaning_common_bile_duct.pdf
    • https://cdn-cms.f-static.net/uploads/4455194/normal_601315606ddaa.pdf
    • https://jawogebewo.weebly.com/uploads/1/3/4/3/134369376/sitopagipa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/06700d8b-b503-415b-af16-83dfb7fdec3a/grandparents_day_song_lyrics_you_spend_time_with_me.pdf
    • http://dijinisefiregot.rf.gd/pewufuxinodujezejabetar.pdf
    • https://uploads.strikinglycdn.com/files/3d21ff6e-5919-4333-bf4b-b74ab49026d6/2020_jeep_grand_cherokee_trackhawk_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/cfc52232-6089-4fc5-a292-c7274903005f/mossberg_590a1_barrel_swap.pdf
    • https://uploads.strikinglycdn.com/files/512ee310-ffdd-46b5-8382-cebaa65c76ea/what_is_the_best_baby_crib_mattress_to_buy.pdf
    • http://gagonunanu.epizy.com/princeton_review_act_practice_test_answers.pdf
    • http://dabinonasibu.epizy.com/bafigorivekaburajususuze.pdf
    • https://uploads.strikinglycdn.com/files/87000d7f-5825-4eb7-a570-127204200e15/toyota_camry_xse_2019_specs.pdf
    • https://uploads.strikinglycdn.com/files/ee78cd7d-8c03-41ee-976f-0d74ec0f6568/safafifimeforisij.pdf
    • https://uploads.strikinglycdn.com/files/e1165627-73d6-47cb-a8b6-44c13f0c60bc/negotiable_instrument_act_1881_section_138_amendment.pdf
    • https://uploads.strikinglycdn.com/files/e4ebda6e-0bd8-4d9c-97a7-582cb9ef100c/who_plays_robin_in_man_about_the_house.pdf
    • https://uploads.strikinglycdn.com/files/44b8c863-5f2a-4b66-9c95-2c4c77335faf/132863666.pdf
    • https://uploads.strikinglycdn.com/files/626b06f3-e8c4-416e-9502-367bcf59dd16/fright_night_freddy_5.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee90.bin
700e38b495104c2f4942d897235af65f683c1a12b4f413e6c5e424d0e90b7d97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE90 5624 bytes

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