Malicious PDF — malware analysis report

Static analysis result for SHA-256 80fdaca9735b9697…

MALICIOUS

PDF

74.9 KB Created: 2021-03-15 02:15:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 85f0181a1eca78f8f9f890c705041c31 SHA-1: a58db16b6fda323ba50c36321f5608679f34c069 SHA-256: 80fdaca9735b96972dc005f86cae7dc85b791c4bf0d53e00a14191412466d5b0
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to other PDF files, suggesting a link farm or redirection mechanism. ClamAV and ML classifiers identified the file as malicious, specifically a phishing trojan. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to drive traffic to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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 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.
  • 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://jacksth.ru/award?keyword=malaysia+electrical+company+profile+pdf PDF link annotation
    • https://fusarutuzazeni.weebly.com/uploads/1/3/5/3/135346017/6815342.pdfIn PDF document text
    • https://lejuziluzamof.weebly.com/uploads/1/3/4/8/134863123/womilobeku_kinegozovafuj_safiwixutagek.pdfIn PDF document text
    • https://wubinuju.weebly.com/uploads/1/3/4/6/134642725/momebibuxixakafir.pdfIn PDF document text
    • https://mufuwavujove.weebly.com/uploads/1/3/4/0/134042856/zimogexipib_bakulo_taradufikidijil_werevosebejowej.pdfIn PDF document text
    • http://jivavesomuviz.getenjoyment.net/sidulomosabavo.pdfIn PDF document text
    • http://sejerodetupumil.medianewsonline.com/kraus_antenna_book.pdfIn PDF document text
    • http://dororuminaxa.mywebcommunity.org/arctic_king_8_000_btu_portable_air_conditioner_reviews.pdfIn PDF document text
    • https://vakinora.weebly.com/uploads/1/3/1/8/131857586/8531094.pdfIn PDF document text
    • http://fajiriduxir.medianewsonline.com/why_wont_my_bradley_smoker_heat_up.pdfIn PDF document text
    • https://masudokunu.weebly.com/uploads/1/3/4/7/134731157/gizasapuris.pdfIn PDF document text
    • https://vaseviga.weebly.com/uploads/1/3/3/9/133986607/087b693f8e8.pdfIn PDF document text
    • https://jabipiduluw.weebly.com/uploads/1/3/4/6/134662585/kozake.pdfIn PDF document text
    • https://vepibasizux.weebly.com/uploads/1/3/1/3/131380915/kitasevoxofajoxikar.pdfIn PDF document text
    • http://tesugujinarijag.mywebcommunity.org/compound_interest_questions_for_class_8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c56764-f68e-4799-9a95-3c84a602802d/oster_6_cup_rice_cooker_steamer.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/63335743198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/541a50e2-fd97-429e-9043-798d27f6014b/needful_things_movie_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/attack_on_titan_manga_season_4_volume_23.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bcb1295-3d01-4156-83f8-6ee799994bb9/saeco_odea_giro_plus_price.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/beautiful_in_white_music_sheet_with_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/70229459652.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/mijijerijuradozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/466bbe25-cf28-4a5a-a42d-4a18d15c5229/pivurajukisetaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/inequality_graphing_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/pedadalanufexuwozinu.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/64943236246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8a1e91d-7b63-4661-a054-e51291dbb1d7/how_to_manually_regenerate_harveys_water_softener.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1B 5408 bytes
SHA-256: c586a38bb1c1c4a66ce59622869704829779bc1ad5da4495560725148e9824c9
font_01_sfnt_off0000fd82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD82 10748 bytes
SHA-256: 0d8e7f1e8751d69c4723658b036d0e2645a7b5f968336d6c7c96c944c424e569

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