Malicious PDF — malware analysis report

Static analysis result for SHA-256 4312de452e7298bd…

MALICIOUS

PDF

79.2 KB Created: 2021-03-22 10:25:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6597660591d70fb222019b76d4790995 SHA-1: 9b84be5d40abf6987783c8d7c96d25c6e7bd542c SHA-256: 4312de452e7298bd97d975570a0e7ed1a6baeb3061793d61b7ebce350188c486
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/strik?utm_term=teams+that+thrive PDF link annotation
    • http://jikalananigopun.iblogger.org/80044677200.pdfIn PDF document text
    • http://cashbackk.site/how_long_does_it_take_to_remove_a_wart_with_salicylic_acidzxkj6.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/ijg5hjb/all_song_video_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/mipijotom/5hheicP/mufofuwikitadavudison.pdfIn PDF document text
    • http://natikolom.site/best_1_year_bible_reading_plangxcaw.pdfIn PDF document text
    • http://xteenware.online/adele_someone_like_you_chords_ukuleleb6bso.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/xixakapajenatiri.pdfIn PDF document text
    • https://cdn.sqhk.co/kefivaxepaj/5Mijhad/zufaxilufazarupatobetixo.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/YhhTggw/drill_down_game_oil.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/36625229390.pdfIn PDF document text
    • http://organicsss.space/ethereum_blockchain_explorer_privatevzzyk.pdfIn PDF document text
    • http://websecurer.tech/5709313944502mkz.pdfIn PDF document text
    • https://cdn.sqhk.co/pabefidinaz/s5fhiA4/checkers_online_duel_friends_online_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lufelumad/idIgdjf/69382650298.pdfIn PDF document text
    • http://itrom.fun/4_conceptos_de_contabilidad_y_sus_autoresw5avz.pdfIn PDF document text
    • http://bijipejip.iblogger.org/naxuwizixemukop.pdfIn PDF document text
    • http://honey-love.ru/17616880121b160i.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/hgjdkib/futevirorisefobupa.pdfIn PDF document text
    • http://vivadoctor.ru/jurnal_penelitian_akuntansi_biaya6wfl2.pdfIn PDF document text
    • https://cdn.sqhk.co/batitiviz/3lidUpy/69836661237.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gebukoxidu.rf.gd/rorewudo.pdfIn PDF document text
    • http://vigexosav.myartsonline.com/10284129866.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF953 4904 bytes
SHA-256: 61bf27f76323e6b703e1400e3012dbc002b70c13df344b0612d820301bb2f5ca
font_01_sfnt_off000109d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D4 11184 bytes
SHA-256: 6252b92ec2f88b9859e44f357a5f8da9409664d92204e77b831e04815837d0ff

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