Malicious PDF — malware analysis report

Static analysis result for SHA-256 753a325020abfeaa…

MALICIOUS

PDF

84.8 KB Created: 2021-04-25 14:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4ccd8825e1ce8b8818f56d9643e76708 SHA-1: 26c27bdfbc30012078017eb6feee8b5f77e26efa SHA-256: 753a325020abfeaaee0fa296d0decc25130bb4f5a1d3864ab8ea4fbaef799377
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The document body and embedded URLs suggest a lure to download content, such as 'ek the power of one songs download' or an 'apk.pdf', which is a common social engineering tactic. The presence of multiple disposable hosting links and UTM parameters further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://baarspo.ru/strik?utm_term=ek+the+power+of+one+songs+download PDF link annotation
    • https://cdn.sqhk.co/fegukajebaj/gPgcpOT/beach_buggy_racing_2_game_download_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448545/normal_5ffbe5b0ac82e.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/iehdijc/mobile_number_locator_find_phone_location_app_download.pdfIn PDF document text
    • http://xaduwojitodefo.66ghz.com/engineering_mathematics_by_ka_stroud_5th_edition.pdfIn PDF document text
    • http://xusonawifofi.iblogger.org/37990765602.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447878/normal_602369506ca9e.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/17317db2-a063-480e-abd1-316832ffe4ef/vivinegovifuguzas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ba207e6-906d-4add-acd3-b62d368aa829/58198351838.pdfIn PDF document text
    • http://butevagowug.epizy.com/66678584236.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/movazabareredapix.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/bonaruxujolifixope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbbe1380-18a2-4bb8-b3d7-65333bc3a898/vizio_v_series_2.1_sound_bar_setup.pdfIn PDF document text
    • http://dibiremiva.rf.gd/low_carb_fruits_list.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/densitron_lcd_display_datasheet.pdfIn PDF document text
    • http://taximupije.epizy.com/atul_prakashan_books_diploma_it.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/48279660048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4d5f056-7c03-4637-ae3e-b5cf37b4b9cd/pufevixavaxivanolaxer.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_off00010d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D48 5416 bytes
SHA-256: edb4b22c1de5669725a4981f41c6a6ad1520446a811eb4a45ac1b5b5a232a810
font_01_sfnt_off00011fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC8 11192 bytes
SHA-256: 9a78361e41954c6c76ce7818cd09a7dea9f78cff822ec26afbf6ceead06df334

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