Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3499a471037975…

MALICIOUS

PDF

94.8 KB Created: 2021-06-30 03:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7ac80f0cf126727e68b18ce05b471cc5 SHA-1: 1314e4f40a92c8c5369064ec3a4127e82ed100b4 SHA-256: ab3499a471037975553f7b6086ae319a3dc4fb4c1763c7021223dad99e21cad1
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised WordPress sites and disposable domains, likely intended to trick users into downloading malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irlanc.ru/uplcv?utm_term=omarion+distance+mp3+download+waptrick PDF link annotation
    • http://vswet.ru/f/79028932413.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160a85b7716046---kezobotebefutifopif.pdfIn PDF document text
    • http://nutrisoilvietnam.com/upload/files/65617494506.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/c01f307455dd8d6238ccbe3938ffdffb/44680198325.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c77f3a099d---68726709678.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/e59df782600f96fcd75614184aeeb636/34397267473.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a15701f557---19361617003.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/sigobevezivetiwezezi.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/91a73591e5078da1a2c6e9012e1e038b/62390447365.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/1f8e15655d0e25a4f5ee135a7f02882c/83493241619.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/2uksdqlhm0dohje43ekma04ug0/pudijavuborukeda.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160abf7f7a2e45---35912651283.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778cc4b77a8---70121005155.pdfIn PDF document text
    • https://pilisilovaskert.hu/ckfinder/userfiles/files/woramiduzan.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7e8feeea2---92554620343.pdfIn PDF document text
    • http://cooper1972.com/clients/b/b4/b451ebb09e7e0345645526f893d9a49e/File/musomixagizilezopal.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/vununoberi.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/9315877477.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/52d7f32c3a1a15c4de601b52a57c91bd/dobepiw.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/m6vs8elv1rbt0f0g83qllctdjp/61436688381.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160856708a57ec---85356535193.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d8884b8ba---31907688801.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/6v8jehor4gq6ojcf0o9v82q9k1/14504932891.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/3pm5f71svduhdbhcpnic5jnkn3/jesikuruvumuwa.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001025a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025A 18204 bytes
SHA-256: 55ff60afaab774e2e3fa058975f8d6df72cfc708da297c4b09b602c760e160f8
font_02_sfnt_off00013278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13278 2008 bytes
SHA-256: 2c8db8ddd080a2e49ef4b5b23bf060180dbf892bfcf6532756c7091b1bd2575c
font_03_sfnt_off00013ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA0 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_04_sfnt_off00015120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15120 11048 bytes
SHA-256: 0b9a9e5fb5502f797113208d01ce05c9b67f549d64ec48bfe4cb4f02a586b954

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