Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b60c0590fc0d25c…

MALICIOUS

PDF

79.3 KB Created: 2021-06-06 19:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f804ff7109648a38909c6cf2fe954c6f SHA-1: 216869b76573ff4bbc7dd60e26e6222b9e413a2e SHA-256: 6b60c0590fc0d25cdd4705c10ef3b95a15cb05529629c375c8a7fe1236387d08
164 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to potentially compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content or downloads. The presence of a 'Download Now' lure further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://laborke.ru/uplcv?utm_term=download+fifty+shades+of+darker+full+movie+dual+audio PDF link annotation
    • http://adance0112.com/upfile/editor/file/83375904373.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607321aad5684---47003321188.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc92414c92---fagigobisajanuwi.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/chkodcijjdbaqrt0jkb61nu5ae/84742273368.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fcc2508e0---57645743695.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/648c2b386f40b0ff7bf95d0e97b53f6c/tinerubifaz.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/347a19690d56da1eb1b26355e931bcc3/rejid.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a8783807b---xudejibujigesobepet.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/pahso9nd7qa8v02il1tj0b7c4c/paxivevekodipabafivopedor.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160812bff54586---voliwatiputokiwupotuwa.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/v9mikgpin0bbbkpdtbnblbc9ft/52151784222.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e004ba1435---bijarejape.pdfIn PDF document text
    • https://kaptenhoki.info/contents//files/49865597115.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/kg4hdavsp6814joou21vnb3k1u/soxidenutuwis.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a75c61effb3---mubebuvugedif.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/saq6oos7vqg0lkf3tqauurfgk6/kofok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC13 5464 bytes
SHA-256: 75d7ab52a785fe49850054ae6d8d0718d99782426959e146b876ef3415993c54
font_01_sfnt_off0000fea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA6 11552 bytes
SHA-256: 63164af4f1cdee3466a26e561b5a4b8e4971bbd85d26968d9d4a43dec2db3a7a
font_02_sfnt_off0001260e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260E 2320 bytes
SHA-256: eff5dea21679b94fba6adfa20d5484cc972ea2a705a67325d9b5d10654944491

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