Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09cb263bfeca73e…

MALICIOUS

PDF

79.2 KB Created: 2021-03-14 18:23:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 19fa36d08a72758e3eff6345d185ee70 SHA-1: 3fe2164c53d10044c5023880a13820112ed6176a SHA-256: a09cb263bfeca73eccaff891beed0aa5d96a53c65b5b938fe750447f0c0e4165
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The sample was detected as malicious by ClamAV and an ML classifier, with heuristics indicating a payment redirection lure. The document body, though heavily obfuscated, contains references to 'Bank of baroda current account form pdf', aligning with the phishing pretext. The presence of external URIs, including one pointing to 'crophysi.ru' and another to 'zivemigidefis.mypressonline.com', suggests the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://crophysi.ru/award?keyword=bank+of+baroda+current+account+form+pdf PDF link annotation
    • http://zivemigidefis.mypressonline.com/62225488003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484818/normal_6019f3bec90f4.pdfIn PDF document text
    • http://sallehq.xyz/manualidades_de_reciclaje7iqm6.pdfIn PDF document text
    • http://flash-sar.online/red_dragon_thomas_harris_quoteshlap2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479237/normal_5fd8154bc7be2.pdfIn PDF document text
    • http://mif-smeh.space/47248316525xzc1q.pdfIn PDF document text
    • http://badgesverified.com/common_core_algebra_unit_1_answer_keyg2zpn.pdfIn PDF document text
    • http://crysety.xyz/tadinodafs0maa.pdfIn PDF document text
    • http://gemajelibetojup.scienceontheweb.net/40847095273.pdfIn PDF document text
    • http://gelufose.scienceontheweb.net/essays_by_ralph_waldo_emerson_download.pdfIn PDF document text
    • http://fenellalucynelle.info/555633347492mfmn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464995/normal_6034295bb2e70.pdfIn PDF document text
    • http://electriccannoz.club/what_kind_of_charger_does_note_8_usep91p8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://judiserod.onlinewebshop.net/chess_openings_book.pdfIn PDF document text
    • http://limoxukuk.atwebpages.com/how_to_stop_first_alert_alarm_from_chirping.pdfIn PDF document text
    • http://dejarovagozude.epizy.com/veziwirotitok.pdfIn PDF document text
    • http://kopajadipovagu.rf.gd/annual_report_ais.pdfIn PDF document text
    • http://livukuxuperum.epizy.com/cronica_de_una_muerte_anunciada_pelicula_descargar_mega.pdfIn PDF document text
    • http://gazisemodab.epizy.com/48360150781.pdfIn PDF document text
    • http://jusowegakero.epizy.com/49077500326.pdfIn PDF document text
    • http://tipipigi.atwebpages.com/zotuwulufidosugugijuvuge.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_off0000f7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EF 5344 bytes
SHA-256: 871bab829c8d4668de4dcc36ddc1669a02a90d08480f0778b1ca2237bb433c30
font_01_sfnt_off00010a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A09 10852 bytes
SHA-256: 3038ac75c965b2da082d1f8590de8175c2071b2affe97f8215552e88693d0ca5

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