Malicious PDF — malware analysis report

Static analysis result for SHA-256 c270037e2bc59306…

MALICIOUS

PDF

76.3 KB Created: 2021-04-18 17:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 723d92a6be71964f256ef8dbd071b194 SHA-1: 561ac6aa93329ffe0aec4192ede34618b6c08cef SHA-256: c270037e2bc593064aac344be4ce55638ab6dd4be212251c39d24a1617b88b3a
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, suggesting an attempt to direct users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=genie+2022+opener
    • http://foodguideblog.com/4089086784141ttw.pdf
    • https://nunezujotegu.weebly.com/uploads/1/3/4/3/134312528/gikade-suvixuw-jotowujubesaso-sedudu.pdf
    • http://lnstagramverifiedsbadgeform.com/74265641394nzbu7.pdf
    • http://uaregroup.com/bujelorotatilipaduxuxijuvk1x97.pdf
    • http://kvadro63.ru/paluvulijejadosububc1w6p.pdf
    • https://jaxikagiwuzeno.weebly.com/uploads/1/3/4/6/134698588/tipiregetunesax-podazagu-gavozutivubu-sepibodut.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • http://moreprodukti.com/who_started_the_greek_godsvzvl2.pdf
    • https://ravawesasusede.weebly.com/uploads/1/3/4/5/134517270/wopurab_rebuwilo.pdf
    • http://bulibujirifubof.scienceontheweb.net/kuxuke.pdf
    • http://mamefumiwuto.mywebcommunity.org/ketilefiweroroneginikode.pdf
    • http://vofufime.mypressonline.com/31114904374.pdf
    • https://jomigotub.weebly.com/uploads/1/3/4/7/134748998/a9b61d13.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_c8b66e313fc646e992505f96ab889c33.pdf?index=true
    • https://uploads.strikinglycdn.com/files/757ce4cb-e14e-4b7a-94f4-4a043a356acb/guloponopex.pdf
    • https://276658a2-c6b1-4a23-bc3b-56c82bce4278.filesusr.com/ugd/f9448a_7210818b26434e3bbc79dbd4b7b6b341.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ec62dcac-649f-47a9-911e-8abef994bc95/32325732343.pdf
    • https://uploads.strikinglycdn.com/files/151255d6-2fbf-48be-92bf-597a58ab2858/lajonogatudamo.pdf
    • https://uploads.strikinglycdn.com/files/a05d4646-8214-48fc-9088-1bbf8d56b0ab/gomawojagedetowevugejidi.pdf
    • https://uploads.strikinglycdn.com/files/e509dc60-1901-4774-b47a-707faeb00964/sojabader.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_off0000ef5b.bin
c73144af9ee75898c60591156a358f14a859629af588e18ce809ada03d238b01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5B 4700 bytes
font_01_sfnt_off0000ff6b.bin
b61d41857811316920f81cf9ebf51f7477935efba371db0be276d81bbb0675fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6B 10884 bytes

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