Malicious PDF — malware analysis report

Static analysis result for SHA-256 61f4eecc59952909…

MALICIOUS

PDF

80.1 KB Created: 2021-05-08 14:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4baa932577b9f71d9b3a64fe79f4c24a SHA-1: 654d87708c3e289376fa1d051a40de87381bd263 SHA-256: 61f4eecc59952909e4b06b78d9fbac30abf38ad1a397fec2bb130ce074677bc9
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan-like behavior. It contains numerous external URIs, many of which point to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly suggest this document is part of a phishing campaign, likely using spearphishing attachments as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://fokemale.ru/strik?utm_term=shark+navigator+lift-away+deluxe+nv360+upright+vacuum+filters PDF link annotation
    • https://cdn.sqhk.co/sisadenev/HZJ4mjc/uber_driver_austin_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/tawunipufop/idvX5or/skip_bo_rules_discard_pile.pdfIn PDF document text
    • http://wogesifuri.iblogger.org/libro_de_las_28_creencias_adventistas_para_nios.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/Uiju6id/map_bedwars_minecraft_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/ggigihg/6915414422.pdfIn PDF document text
    • https://cdn.sqhk.co/vadezewe/e8OjiuV/3d_bass_boosted_song_download.pdfIn PDF document text
    • http://letaraluzim.scienceontheweb.net/32952231302.pdfIn PDF document text
    • http://zadebunijuzo.22web.org/idle_hands_are_the_devils_tools_quote.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/naligibarubuvopatejilim.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/iidhcgc/pizexekanilam.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/gX7hf7A/hard_boiled_egg_time_boiling_water.pdfIn PDF document text
    • http://retoxen.mypressonline.com/definicion_de_texto_descriptivo.pdfIn PDF document text
    • https://cdn.sqhk.co/nobukomorur/hgJAeGW/coursera_financial_aid_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/womalakifaxa/9hdgdgg/network_marketing_quotes_images.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/0if6jjn/daily_plan_template_word.pdfIn PDF document text
    • https://cdn.sqhk.co/lewovazu/ifgwIig/bebokagadi.pdfIn PDF document text
    • https://cdn.sqhk.co/meduxemij/vLdhdnF/82083723084.pdfIn PDF document text
    • https://cdn.sqhk.co/pasededi/Gdibnid/zudibafe.pdfIn PDF document text
    • http://gadatoreneperil.mygamesonline.org/asme_section_viii_division_1_appendix_8.pdfIn PDF document text
    • https://cdn.sqhk.co/lovojekaboxi/jdhJZgj/fovagidojijexiruwekur.pdfIn PDF document text
    • http://gerododuxokamid.iblogger.org/mexijivozetedifejefim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nataruwe.epizy.com/vagigupilutarifadusebadi.pdfIn PDF document text
    • http://fowagamop.rf.gd/30271327269.pdfIn PDF document text
    • http://tuzexom.rf.gd/zularizijo.pdfIn PDF document text
    • http://xekoduxunadisum.rf.gd/lidurugotokabokojefalomo.pdfIn PDF document text
    • http://ludujefu.epizy.com/canon_powershot_sx700hs_battery.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_off0000f650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF650 6552 bytes
SHA-256: e1caeda9ce70d34d76007192da66bb5aeabc61037b1a7d69af2530cef44b0743
font_01_sfnt_off00010c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8D 11180 bytes
SHA-256: cb5ca854a53251135186961401e19c759cc4c88343327056d3ae2062080b23b5

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