Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddfc120840c917bc…

MALICIOUS

PDF

80.1 KB Created: 2021-03-22 16:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: be3c71df1bb753c6f480b6d804c489bc SHA-1: 2790bf0815dde43e042751601cf168a75165f2f4 SHA-256: ddfc120840c917bc2aadf5c3232618ce1599b912afc0497e14d12a35c61e1e36
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://jacksth.ru/strik?utm_term=the+beatles+complete+scores+pdf+descargar', suggests a lure related to downloading Beatles scores, likely to redirect users to malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=the+beatles+complete+scores+pdf+descargar PDF link annotation
    • https://dapemoko.weebly.com/uploads/1/3/4/6/134647299/wulilezeje-munijeme-vifegulot-nomitusisado.pdfIn PDF document text
    • http://gbarb.me/bepilaxalddm1i.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/Uibggmr/stranger_chat_app_no_login_apk_download.pdfIn PDF document text
    • https://zororoxuz.weebly.com/uploads/1/3/4/3/134309160/xogonefumesurupo.pdfIn PDF document text
    • https://tesegape.weebly.com/uploads/1/3/5/3/135387632/b0850ded20823e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480755/normal_60372aa1dfe19.pdfIn PDF document text
    • https://cdn.sqhk.co/wavefekus/gdkjgT1/transfer_sim_card_to_new_phone_sprint.pdfIn PDF document text
    • https://cdn.sqhk.co/pasudajuwesa/AH06ifU/sms_forwarder_activation_code_airtel.pdfIn PDF document text
    • http://vodoroding.info/tejipilejevexitameput2qoov.pdfIn PDF document text
    • http://lowazutax.22web.org/should_seasons_of_the_year_be_capitalized.pdfIn PDF document text
    • http://nekretnine.site/keduvorzsbe7.pdfIn PDF document text
    • https://cdn.sqhk.co/buzaxelubot/IJgfVDD/jutunaninutavo.pdfIn PDF document text
    • https://sagakoto.weebly.com/uploads/1/3/0/8/130814189/jukagofimat.pdfIn PDF document text
    • http://filanion.online/78301164874rhi61.pdfIn PDF document text
    • http://prodit.space/what_is_a_personal_essay0v72b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474977/normal_604ec05383043.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/rogugagatuf/10857559009.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/grade_9_english_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/74676421868.pdfIn PDF document text
    • http://mafolizol.rf.gd/5419973783.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/individualized_student_learning_plan_template.pdfIn PDF document text
    • http://monufaro.epizy.com/katzung__trevors_pharmacology_examination_and_board_review_12th_edition_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/72556938800.pdfIn PDF document text
    • http://femavumifixomud.rf.gd/audio_file_converter_software_free.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_off0000f8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A8 5660 bytes
SHA-256: 058c542f868849370e0a5dcdf705f5ad25eea329cc4e9c060a95bf14c541d5a6
font_01_sfnt_off00010bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB3 11080 bytes
SHA-256: 8419d032b60cf44c6b17839cd1c2bad258033ce9a631e357ece840849b1c5010

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