Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa96c33e7bd80e7…

MALICIOUS

PDF

88.2 KB Created: 2021-08-03 01:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 3f2686dfa18772bcdbdf21e2ccaeda4d SHA-1: b3568490c884d749b02712c43708e7d0b8f0b0bc SHA-256: 3aa96c33e7bd80e77b5810138eec825744a0a98508dfc707197ecc92ccaffb58
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farm heuristics, indicating a strong intent to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious content, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to exploit user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crewmak.ru/uplcv?utm_term=null%27s+brawl+stars+mod+apk+ios PDF link annotation
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607487aaf4001---4670355926.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ad227603060---nifitoburekotikew.pdfIn PDF document text
    • https://mimpishio1bet.com/contents//files/56031133878.pdfIn PDF document text
    • http://www.bash.cl/media/file/mapomusu.pdfIn PDF document text
    • https://grandstone-egypt.com/userfiles/file/sagodadoviriwevub.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/81994747585.pdfIn PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/59818268191.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/0953ebafe91514258694f2628e3bdd91/piluzu.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/fdf044pqfq6o57ld5sbchc22q1/24572497463.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d28b74b38d1---pibegemivanafovapuk.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/63951041481.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/b1taboust6k6kaoe2biqfgj5ff/20134236463.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/48543484018.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/47969786648.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16085c138170c5---lobubikobaxofuguredujom.pdfIn PDF document text
    • http://caigeshi.com/uploadfile/file/2021052914355573499.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/salevumijifaxidaloki.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/d1df0aaac8d0c9928c1c45e01cb8a064/nojovuvov.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160fa1f49ebbd4---8993096269.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1aa0e7910---sowakikuxoxiwakobibufoto.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/89012212708.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607181e07d04b---25065442517.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/71176632345.pdfIn PDF document text
    • http://badgerhillfarm.uk/luxavufeneb.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98F 1692 bytes
SHA-256: 6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13
font_01_sfnt_off0000f193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF193 17368 bytes
SHA-256: 0fa712fe11efc362d2a72afabd70e949a75c27a66d2e6b794d55cf1b4ca4e9c0
font_02_sfnt_off00011f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13723 10748 bytes
SHA-256: 966060e779a67b5f5ae5489d20c1cc36b16f182960616a13af584208f027e9d1

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