Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba63840b8fdf884e…

MALICIOUS

PDF

77.4 KB Created: 2021-03-01 10:48:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f160714ef460ea4557d1e062beddf159 SHA-1: 752d7a4dc30ba3b4a9d804817c73dcc83e6ce812 SHA-256: ba63840b8fdf884eedb01beb6aebc6e2a0a19a86075bcba6e309ab644905d593
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ponafet.ru/wb?keyword=the%20redemption%20song%20bob%20marley%20lyrics PDF link annotation
    • https://gunagabivap.weebly.com/uploads/1/3/4/8/134863042/zexemefaja_jidanutik_buzimazuwilixuv.pdfIn PDF document text
    • http://thedefenseforge.com/formato_de_incapacidad_del_imss_editablegvr55.pdfIn PDF document text
    • https://boxavukexuzar.weebly.com/uploads/1/3/0/7/130775797/wesuxopu_tobagilufe_pazuwuzam_pariwazixoseto.pdfIn PDF document text
    • https://jimekijan.weebly.com/uploads/1/3/2/8/132815057/sowedamojutonom_limikilexul_siketinuviz.pdfIn PDF document text
    • http://xploitcrew.io/gemibatgz9ho.pdfIn PDF document text
    • https://kujegafibez.weebly.com/uploads/1/3/4/2/134265926/gikovesogaputes-worebokanexoxev-jufidavojudi-vaxetukajemo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/bososuxunila.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/63900563431.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/free_formal_and_informal_language_worksheets.pdfIn PDF document text
    • http://zilowovuv.atwebpages.com/do_2_aries_make_a_good_couple.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/crazy_train_marching_band.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/medicaid_doctors_in_dewitt_michigan.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/gametv_plus_cho_win_10.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/happy_wheels_free_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/crash_bandicoot_3_ps3.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/apink_nonono_dance_version_mp4.pdfIn PDF document text
    • http://rotufixijisadi.onlinewebshop.net/how_to_load_a_primo_water_dispenser.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/arcgis_pro_2_full_crack.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_off0000ef01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF01 5680 bytes
SHA-256: 95d88cca9ab6cd1fde4d249193507648ce10511524d1d4a1afee12f75976143b
font_01_sfnt_off00010220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10220 10744 bytes
SHA-256: af1401d8079b673c24282f62917b2da6358c93e20d33f5066e6905b67c5f9eca

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