Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8bb1d76e24dfd5…

MALICIOUS

PDF

70.8 KB Created: 2021-03-20 12:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c3ae8a4b1262bc64c8fbdea1bbf1052b SHA-1: a1112872d29a66dda1ec0b1841d66ff4e6b7fde0 SHA-256: 0c8bb1d76e24dfd5c7040e1d90174f275929ed5c0687fe81edf8496191ddf02c
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 phishing or trojan threat. The document contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the 'link farm' heuristic strongly indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=how+to+clean+graco+snugride+35 PDF link annotation
    • https://cdn.sqhk.co/xogodapap/5jduHjd/minecraft_among_us_map_pe.pdfIn PDF document text
    • https://sumajodezidozi.weebly.com/uploads/1/3/3/9/133997227/673513.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/jdhhcl7/free_printable_realtor_open_house_sign_in_sheet.pdfIn PDF document text
    • http://xisulekotitis.iblogger.org/akinete_formation_in_cyanobacteria.pdfIn PDF document text
    • https://duxetaxegijojem.weebly.com/uploads/1/3/4/8/134870405/pumuzerefixufawug.pdfIn PDF document text
    • https://bododomeliba.weebly.com/uploads/1/3/1/4/131408614/donorog-juxuxi-fujupiwifal-butamewowamagi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sosagid.epizy.com/gmetrix_answers_word_2016.pdfIn PDF document text
    • http://tagejenetel.rf.gd/89742465069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbc9e418-58df-45ea-bed2-d855039d4458/attack_on_titan_anime_season_2.pdfIn PDF document text
    • http://vupoxutefefa.rf.gd/interesting_facts_about_human_brain.pdfIn PDF document text
    • http://menawikilu.rf.gd/726799147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f0f302a-d60b-469a-8649-a7f8f1bb37f7/how_to_score_gre_verbal_reasoning.pdfIn PDF document text
    • http://lozisuvuxinosog.epizy.com/kitchenaid_5-quart_artisan_tilt-head_stand_mixer_ocean_drive.pdfIn PDF document text
    • http://wigelasipop.rf.gd/a_b_r_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/tarkov_hatchling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/interior_and_exterior_angles_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/sawitizuvomesin.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/hum_hain_bemisal_south_movie.pdfIn PDF document text
    • http://jijutapomu.rf.gd/fearless_friday_5a_football.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c286ab14-57ba-4e08-90f8-24d9cb7f5454/how_long_does_post_acute_withdrawal_syndrome_last.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD27 5328 bytes
SHA-256: 1926bc2f4daff09a9107d5c1ef42a81fdb6ff67112e248af1857fe6f6cae2fc2
font_01_sfnt_off0000df5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5E 9092 bytes
SHA-256: 77a64c92bd64bac07a49d9d3acc23c96820124ea7e9fbb2de4179e0d474a66be
font_02_sfnt_off0000fe70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE70 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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