Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ba3b0d5930d31e…

MALICIOUS

PDF

77.3 KB Created: 2021-03-23 04:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df3e0723b3bb689c94f336eb71c38538 SHA-1: d6c94f183319e36070f4130ff8fbdf2b2d7911a8 SHA-256: d3ba3b0d5930d31ef419209f4c6dea82019d225f90055e17d3309609e9dc4b3d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with the primary URL pointing to a suspicious domain. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/aws?utm_term=hannah+arendt+the+human+condition+quotes
    • https://xexijezukivox.weebly.com/uploads/1/3/0/8/130874296/sixogafawixuval_fapobo_dosuxanujewif.pdf
    • https://cdn.sqhk.co/kigimole/3ieZ5hg/tofobogilijanutilezip.pdf
    • https://cdn.sqhk.co/kazaluxi/ivhfCad/9921202935.pdf
    • https://wanalepawipetep.weebly.com/uploads/1/3/1/8/131857983/vubefamifarejow.pdf
    • http://dressnbuy.com/misure_cautelari_processo_amministrativoiuj7h.pdf
    • http://fakaripeti.xyz/25126537116tr75z.pdf
    • http://reduslimitalia-official.site/pete_the_cat_and_his_4_groovy_buttons_printablesxjr9q.pdf
    • http://kismyketio.com/practical_infection_prevention_and_control_in_healthcarecwv04.pdf
    • https://cdn.sqhk.co/wijelukifap/aidgfgh/bluetooth_switch_lite_controller.pdf
    • http://mixit.info/schwinn_ad7_airdyne_upright_exercise_bikeh06na.pdf
    • https://topepixifugop.weebly.com/uploads/1/3/4/3/134322533/bonobozopapi.pdf
    • http://fopekoriw.sportsontheweb.net/blood_agglutination.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/neporezofov/calculus_2_practice_problems.pdf
    • https://s3.amazonaws.com/bitajemisajoz/rinaxobutixizezosuwodofu.pdf
    • https://s3.amazonaws.com/divexikav/characteristics_of_information_for_decision_making.pdf
    • https://s3.amazonaws.com/xapidajovaji/40045992377.pdf
    • https://s3.amazonaws.com/pizivurapab/zagoginanovulijiderofu.pdf
    • https://s3.amazonaws.com/vaxebisapesi/43610165526.pdf
    • https://s3.amazonaws.com/wemazun/gameshark_2_ps2_iso.pdf
    • https://s3.amazonaws.com/xozeb/affidavit_of_support_form_nvc.pdf
    • http://widepidaba.atwebpages.com/jidar.pdf
    • https://s3.amazonaws.com/marimejerebo/innovators_dilemma_audiobook_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc5.bin
cc28d1833a9e5f5e1534bdd59349d62a1c69d681abbbbee9ab3a332aeea2d333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC5 5236 bytes
font_01_sfnt_off0000ff5d.bin
0876d9f058e80b56f9ee3caf43cad991bcd209646b70d2c914e3a92cf6a9a33b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5D 11980 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.