Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ce84b4311437e8…

MALICIOUS

PDF

100.9 KB Created: 2021-03-10 11:09:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 983c6011c59b26d7e728e0b1835060c6 SHA-1: 4a7f159c759a9d2f41db907ce867afebe246a17b SHA-256: 24ce84b4311437e8601969e2fb3075d789bcd16d705cf2fd8e043b852126535e
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, appears to be a lure related to a Dell Latitude 7490 data sheet. The presence of multiple disposable domains and link farms further indicates a phishing or scamming operation. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=dell+latitude+7490+data+sheet In PDF document text
    • http://grenkasalo4.xyz/rexawilojudekamea48b9.pdfIn PDF document text
    • http://tehnopolis.org/amplificador_line_6_spider_iv_150w3j29x.pdfIn PDF document text
    • http://tricitysikhs.com/what_does_proofreading_marks_mean2lc3z.pdfIn PDF document text
    • http://xemokajoled.medianewsonline.com/latest_celebrity_news_gossip__photos_tv__showbiz_daily.pdfIn PDF document text
    • https://cdn.sqhk.co/fapiwejagiz/gdhbjja/72116697655.pdfIn PDF document text
    • https://zotamitogimida.weebly.com/uploads/1/3/0/7/130775261/vafidesa-wikakekoxoz-judukixibibo.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/ZhbgimR/health_disorder_definition.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/shirley_jackson_the_lottery_interpretation.pdfIn PDF document text
    • http://roguvopupo.22web.org/vukibarej.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/wiarMhi/verizon_visa_card_customer_service.pdfIn PDF document text
    • http://mon-cmbretagne.best/19773861888q7e0d.pdfIn PDF document text
    • http://natur-bio.space/how_to_turn_on_element_tv1nexw.pdfIn PDF document text
    • https://salapabozob.weebly.com/uploads/1/3/5/3/135326799/653c2217918.pdfIn PDF document text
    • https://gawosiluzetur.weebly.com/uploads/1/3/4/6/134631715/1e79df9f8de.pdfIn PDF document text
    • https://mevimozow.weebly.com/uploads/1/3/0/7/130776561/fewasuko.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/3o5Chc6/naruto_ninja_blazing_lost_account.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/a2b45e89-9c63-4dfd-b2cb-c0df071f8beb/pokemon_fire_red_rare_candy_cheat_gba_emulator_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6229be6-b187-42c9-a7ea-6bc421d746bb/operaciones_combinadas_con_fracciones_3_eso_word.pdfIn PDF document text
    • http://jizuvopanusin.rf.gd/38346559881.pdfIn PDF document text
    • http://vigavanoxe.onlinewebshop.net/what_does_the_word_guarantee_mean_in_spanish.pdfIn PDF document text
    • http://datasixiva.epizy.com/90786110881.pdfIn PDF document text
    • http://wofuxuvo.rf.gd/30293783152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0677c703-ced6-42ac-84c9-f6145ea9a9b4/what_to_get_someone_who_likes_to_paint.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_off00013f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F07 5280 bytes
SHA-256: 8ca4da1827ce99c6f083eede3050011b97557a21a87353ab61dd8ff4037638d9
font_01_sfnt_off0001510a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1510A 19156 bytes
SHA-256: d9b9e7ccca594027be71aa016b9869a9df47b654a1d5ccd6315a5f2c63cac969