Malicious PDF — malware analysis report

Static analysis result for SHA-256 43cc54b902827999…

MALICIOUS

PDF

78.7 KB Created: 2021-04-20 07:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 845d9e39d6af67f1c8b8130e5e63b5b2 SHA-1: 78c3bb8793827d3b19456cc5ec9bcea757de3a97 SHA-256: 43cc54b902827999f012a5e8a8ed72a4e66903b99e366eaee4cd475e3a26d5d7
146 Risk Score

Malware Insights

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

The PDF document contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to a 'B complex tablet used for throat infection', which serves as a lure to direct users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://mezovuduw.ru/strik?utm_term=b+complex+tablet+used+for+throat+infection PDF link annotation
    • http://noxogejukebe.mypressonline.com/72238211536.pdfIn PDF document text
    • http://paselon.getenjoyment.net/39716406365.pdfIn PDF document text
    • http://fedexonep.mypressonline.com/poduf.pdfIn PDF document text
    • http://tapikival.22web.org/jibopefufexule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427821/normal_606e84f475811.pdfIn PDF document text
    • http://pornbustyvids.com/mozemetuzikomomn496o.pdfIn PDF document text
    • http://nenodipemuxok.mypressonline.com/all_bike_company_name_list.pdfIn PDF document text
    • http://phtech.site/download_oracle_virtualbox_for_windows_server_2012_r2qdbhu.pdfIn PDF document text
    • http://salestore.pro/high_on_fire_de_vermis_mysteriis_rarb40vf.pdfIn PDF document text
    • http://milesnires.xyz/ajax_uefa_champions_league_winning_history_listodlul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_603d14ab91345.pdfIn PDF document text
    • http://ru-dev.xyz/the_grand_inquisitor_analysis_reddite4g43.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/041dde95-3e65-4bdb-b6da-2dd03362d2ff/3rd_grade_math_books_barnes_and_noble.pdfIn PDF document text
    • http://punejiva.epizy.com/blush_color_formal_shoes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c82acd3c-c643-49cf-b456-edfa4362906c/54908937169.pdfIn PDF document text
    • http://muputuxu.epizy.com/how_many_calories_are_in_a_large_sonic_coke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f957e6cf-b587-49ae-8edd-cf4ad6010b37/11823839670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7adbdfc2-f0e2-4b35-af74-d8e21c82a1f0/how_do_you_calculate_exchange_rates.pdfIn PDF document text
    • http://jinufezep.epizy.com/18826476408.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/62650886921.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/apprendre_a_lire_l_arabe_facilement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba0cc5ae-207b-4d5f-b35d-d14676a81f20/37678841624.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/dolphin_browser_android_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/equivalencias_entre_unidades_decenas_centenas_y_unidades_de_mil.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_off0000f3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C2 5652 bytes
SHA-256: 853a3b849c2424b8ad06830ca43c8a8754e24aa3d1eabf25a03de7bccbb8c47e
font_01_sfnt_off000106cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CB 10760 bytes
SHA-256: 70b6e9c4f9f54412d21dae93eed0ea8ff2829b2e99b62816a000403925155ea1

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