Malicious PDF — malware analysis report

Static analysis result for SHA-256 44863391cc342514…

MALICIOUS

PDF

79.8 KB Created: 2021-04-04 12:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82a12948264f25453ce804faedcc800e SHA-1: 74541448a2e35ac3d581828405de216c090dc65e SHA-256: 44863391cc3425143470b1f6232ebb08915f19dd3e26f58e3e104ccb56c69b1c
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which could be used to facilitate malicious redirects or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=kenmore+ultra+wash+2+dishwasher+parts
    • http://topcreditreport.info/who_manufactures_envirotemp_gas_water_heatersdvoki.pdf
    • https://tamilazubi.weebly.com/uploads/1/3/4/6/134604156/fiweluvuja-zuzekof-pusalokezove.pdf
    • http://vash-komfort5.ru/are_old_sports_illustrated_swimsuit_issues_worth_anythingrkbrf.pdf
    • http://thrivewebs.com/dot_net_tutorial_w3schoolso9sgs.pdf
    • http://erogan-oficial.site/25147447181z7h76.pdf
    • https://vikumufum.weebly.com/uploads/1/3/1/3/131398575/470716cd.pdf
    • http://salebox.shop/utorrent_free_movies_pakistani4svcx.pdf
    • https://nujamoxe.weebly.com/uploads/1/3/4/2/134234607/1478513.pdf
    • http://hayatevesigar.online/how_to_change_premiere_pro_resolution1mrpw.pdf
    • http://igonlinesupport.com/is_a_ministers_housing_allowance_taxablej6n5e.pdf
    • http://dommasters.site/watchman_nee_the_spiritual_man_youtubejzxag.pdf
    • https://zugixipenelir.weebly.com/uploads/1/3/4/5/134591811/863325da90.pdf
    • https://mapunexi.weebly.com/uploads/1/3/3/9/133999872/xizamufuten.pdf
    • http://dream-stat.ru/6475986342767ha7.pdf
    • http://dominis.xyz/99748896625auqjt.pdf
    • http://mscgis.net/how_to_ease_back_pain_scoliosisy9xwj.pdf
    • http://reduslim-eu.site/xujirepelogitv6f71.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ef3db0a8-cfc5-4ec2-a435-2774a102e8a9/how_to_do_gift_box_with_paper.pdf
    • https://uploads.strikinglycdn.com/files/e9c5ff53-5a9e-4e1e-865c-377a2e3011f7/savipugalowitufekuve.pdf
    • https://s3.amazonaws.com/lusabifef/audi_s4_avant_pcp_deals.pdf
    • https://uploads.strikinglycdn.com/files/a621180b-1da1-438b-8c26-61520ee1c2c8/zupomowipepojidusud.pdf
    • https://uploads.strikinglycdn.com/files/fedb471d-2313-45c8-ae77-d0b91a4a509e/c_quick_reference_guide_template_word.pdf
    • https://uploads.strikinglycdn.com/files/2aaed80f-acd9-43de-9e22-6b639615ed83/3385927830.pdf
    • https://s3.amazonaws.com/toguvaju/netflix_app_for_android_box_old_version.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbb3.bin
2a65edcd231bcc17438f1655cc5cc3bd31d21116c829ba430e0cd14e9a50bf72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB3 5392 bytes
font_01_sfnt_off00010df3.bin
ef14b5f6ca538c49eb280dc94767db0ad47a94aa2411b5e2d826085498decd7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF3 10572 bytes

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