Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ec331ce8bb6141…

MALICIOUS

PDF

75.9 KB Created: 2021-03-24 15:57:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 74216067770e404f6e831cae6733d97c SHA-1: cab132db64fc0a2fe58383d48ede87444cf5f139 SHA-256: 53ec331ce8bb61412c541ea65e316f346547c17cf0bdb1bbe8c108450ecde27c
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The document contains numerous embedded URLs, suggesting it functions as a link farm designed to redirect users to potentially malicious external sites. The presence of external URIs and the 'link farm' heuristic strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://druttle.ru/strik?utm_term=how+to+use+ti-83+plus+for+statistics PDF link annotation
    • https://cdn.sqhk.co/nebafori/rhagiax/braains._io_game_unblocked.pdfIn PDF document text
    • https://sekatuxu.weebly.com/uploads/1/3/4/8/134894727/popaxawopu-sikodurowasosug-nidom-kusex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_602c2aa52991d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456132/normal_600202915b6c5.pdfIn PDF document text
    • https://riwobasafogad.weebly.com/uploads/1/3/3/9/133999818/3700442.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501654/normal_5ff965c6a35da.pdfIn PDF document text
    • https://ragusixiseditof.weebly.com/uploads/1/3/0/8/130814169/liwoxiweziduxu_kinelim_ludezemunomop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390642/normal_601279fe4a402.pdfIn PDF document text
    • http://dozixolabizije.iblogger.org/kezidokuxexabug.pdfIn PDF document text
    • https://cdn.sqhk.co/zipedufipiz/uCUhjgi/home_health_case_manager_job_description.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelenid/ha8jfjX/edge_lighting_samsung_a71_not_working.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://62619d47-812b-4c4f-a232-aa08d86264e8.filesusr.com/ugd/6d62c1_2c72185a2a5542bb97a237e6a2961f33.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/nomodiso.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/anti_theft_alarm_pro_apk.pdfIn PDF document text
    • https://9370005b-87d8-49d8-b27c-18dce193a2f1.filesusr.com/ugd/52ea04_e7425b4a93a6413896679b0168f913a3.pdf?index=trueIn PDF document text
    • http://tonerud.epizy.com/ford_mustang_gt_horsepower_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/beach_girl_wallpaper_free.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/how_to_use_john_the_ripper_password_cracker_windows.pdfIn PDF document text
    • http://ramimofisodufos.epizy.com/liladubera.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_off0000ea71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA71 5452 bytes
SHA-256: fc241e1c1df110de19c9ebbf33741b1488f28e11a0cd2c0dcd05d24bdf958df8
font_01_sfnt_off0000fd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD23 10972 bytes
SHA-256: c918ae170d03b217e1217ac2b486517a3284f557d68d07e26130b82516537c3a

Open this report in the interactive analyzer, or submit your own file for analysis.