Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df5516922bf9c38…

MALICIOUS

PDF

95.8 KB Created: 2021-03-21 09:49:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2634a9608dd1d6a0e2bfcbb248c52487 SHA-1: befbe2bd5c6e6d43d07fbe8bf18c08d323b7da16 SHA-256: 6df5516922bf9c384c46033fd419ea32381ae6dd4533283513f5f717b74d42a5
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to search queries, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware-hosting sites.

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/wix?keyword=the+vampire+diaries+season+2+episode+23+bg+subs In PDF document text
    • https://cdn.sqhk.co/viwedanej/hhhije3/netflix_party_mobile_download.pdfIn PDF document text
    • http://fomilexavekol.22web.org/amazing_game_show_answers.pdfIn PDF document text
    • http://nedipupuru.22web.org/sojevazidovisuja.pdfIn PDF document text
    • http://mebelrostov.ru/arduino_coding_tutorialkpfgy.pdfIn PDF document text
    • https://cdn.sqhk.co/vedoreket/Aiihjc5/vivaninowagunojilowomid.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/G5ijDtS/bekonutu.pdfIn PDF document text
    • http://216tilford.com/64379103263nbxea.pdfIn PDF document text
    • http://dubulus.iblogger.org/kesanomid.pdfIn PDF document text
    • http://compte-cmbretagne.best/lr_androids_dokkan_battlece6sp.pdfIn PDF document text
    • http://dolobovofozuz.22web.org/14655422413.pdfIn PDF document text
    • https://cdn.sqhk.co/genibesarizi/Mijjjic/96904765905.pdfIn PDF document text
    • http://zujadise.scienceontheweb.net/6176336438.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/EjvGCjh/18444602581.pdfIn PDF document text
    • http://sowufevoga.iblogger.org/alodine_1201_msds.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kotasogova.rf.gd/bearded_dragon_diet_sheet.pdfIn PDF document text
    • http://sibubixusa.epizy.com/weber_spirit_ii_e-310_price.pdfIn PDF document text
    • http://nimizojajokupij.rf.gd/suzanne_powell_alimentacin_consciente_gratis.pdfIn PDF document text
    • http://motitagododef.epizy.com/waviwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25e0b07c-148e-4744-ab3a-72695d99a6df/is_a_bowflex_a_good_workout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b56682f-c887-49c5-95cf-3905c86b5f8d/bissell_proheat_2x_lift_off_pet_carpet_cleaner_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bf579f1-4b35-4d3c-b20f-cea4147f2f50/que_significa_ceir_los_lomos_en_la_biblia.pdfIn PDF document text
    • http://wikukodukoja.onlinewebshop.net/vespa_px_125_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/902d3005-c0f4-49c6-8496-6b04e63d9bff/the_road_not_taken_analysis_shmoop.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_off0001379b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1379B 5788 bytes
SHA-256: 28c9431c7c0cb9c597f8bb3b8ae912f5e8a737d312f28bc18849fba7875926a3
font_01_sfnt_off00014b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B1C 11244 bytes
SHA-256: 47d6b254f5da6735353c2a947e78fd1b7134d4e73b0f94f629fb916880dc95f9

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