Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f56a1b0e129625…

MALICIOUS

PDF

77.4 KB Created: 2021-04-18 06:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cedc82e5cb36998174d2dc0762154977 SHA-1: 923faf3dcc5ef3e06d151b0d88b7fb3b7a322226 SHA-256: 09f56a1b0e129625064d59f10617a0e4616e70b417c2c873bcf75c54bb935048
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via these links. The embedded JavaScript may be used to further obfuscate the malicious activity or redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://seumenha.ru/strik?utm_term=wendy%2527s+small+frosty+ccino+calories PDF link annotation
    • https://cdn.sqhk.co/nokotadi/6kjevGA/slice_of_veal_crossword_puzzle_clue.pdfIn PDF document text
    • https://cdn.sqhk.co/fakomuse/igjaLhj/pillars_of_eternity_2_maia_romance_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/zimamoko/cCWAjdO/tratados_internacionales_ambientales.pdfIn PDF document text
    • http://wisujaf.iblogger.org/kekote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378845/normal_6027c89268244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443326/normal_6035fe0387e48.pdfIn PDF document text
    • http://sexogovo.iblogger.org/wupanopomugaveme.pdfIn PDF document text
    • http://jumitom.22web.org/95332374420.pdfIn PDF document text
    • https://cdn.sqhk.co/dunuxorigu/bFnjjih/39179330219.pdfIn PDF document text
    • http://tifetatujuvib.22web.org/rampton_cqc_report_2019.pdfIn PDF document text
    • http://kiwaliguza.iblogger.org/videoder_14._4_1_premium_apk.pdfIn PDF document text
    • http://wukebejajixajen.iblogger.org/pugudumivadu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466675/normal_5fd1d992ed406.pdfIn PDF document text
    • https://cdn.sqhk.co/gimovitax/gFjaoJ2/t800_cyborg_vision_arlington_va_22201.pdfIn PDF document text
    • http://watomidipokaki.22web.org/pelunamebepo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470835/normal_5fda73924c614.pdfIn PDF document text
    • http://zemegulobeka.iblogger.org/libro_metodologia_dela_investigacion_sampieri_5ta_edicion_ao_de_publicacion.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lofuwup.rf.gd/where_can_i_buy_a_miniature_german_shepherd.pdfIn PDF document text
    • http://weregoxo.epizy.com/80711993564.pdfIn PDF document text
    • http://sukidagijonola.rf.gd/kowosaliw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76caa709-e78e-4d4d-98e1-cecec305c242/cisco_networking_essentials_exam_answers.pdfIn PDF document text
    • http://diwekudajon.epizy.com/mugisomojekin.pdfIn PDF document text
    • http://nawopezor.rf.gd/active_listening_test.pdfIn PDF document text
    • http://sesosufavi.epizy.com/hp_application_lifecycle_management_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49634878-e502-4647-940c-d53943e23de1/song_can_bring_back_memories.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_off0000eacc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACC 5316 bytes
SHA-256: 7ac6bfe3a5cecd54685c5868b3dc96cd246bb02bc4abcacf9e57ee6fb56cbbdb
font_01_sfnt_off0000fce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE1 12208 bytes
SHA-256: ef11299398a91c8ba23e9386508c74186fb165aa157030f51ec390e00c4399d4

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