Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e6cb29efe0f651c…

MALICIOUS

PDF

84.0 KB Created: 2021-06-30 21:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9525eacfa3f920a0fdff7feaac3f0a8b SHA-1: f874f9440e5223be7bbe3810d0e14886d54ef5b3 SHA-256: 3e6cb29efe0f651c2e0b268c9ac2aa832588f69b0ffbf0d83e471000d0b84de6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the heuristics and the presence of many URLs suggest an intent to facilitate phishing or malware distribution, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://laborke.ru/uplcv?utm_term=such+a+moron PDF link annotation
    • http://www.lnk-creation.fr/upload/file/vegivofisusiwagebanowuxo.pdfIn PDF document text
    • https://melz-feu.ru/upload/47722861464.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/livelekelekiv.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/24e4aacf9f0b614b6dbe4fb868655922/74842982991.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ada40b79a---38409686819.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/9c0748626dceecbcad78773ccb2189a7/9296431217.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/5bc3b7279031580ab70c1dfc42d4c95b/zuvawoxilorenifepudig.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f4ec8b041---mimifotaxet.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/fovofobosilup.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16095b7fe8f63f---wufezurega.pdfIn PDF document text
    • http://cymagun.com/userfiles/tonusenolila.pdfIn PDF document text
    • https://securitydm.com/slicice/file/bawalos.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/58698457c2d661ff80daebbffa7cc021/54030181574.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/c9aumsmqrg0060t9ept5uffham/91605108960.pdfIn PDF document text
    • https://embassyinvietnam.com/webroot/img/files/12602717376.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607073e96adc7---29391610189.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/jarudikisere.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/3af0ecb524ff2bb5cf3567e170d6209f/86649092259.pdfIn PDF document text
    • http://www.monts.sk/upload_images/file/89928463582.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/98209722197.pdfIn PDF document text
    • http://vickerycarpet.com/uploads/images//files/teziwibizijatefeb.pdfIn PDF document text
    • http://sunnysidehigh65.com/clients/d/d0/d00d1ad1640c45b888f5e58ac216a5d1/File/gapefejolumade.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160923f7d3c628---22313268238.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7c9a0a08c---giwojagamuluruvuwefibani.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160896abdcd53f---fejisidatezadetulorevi.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/76634027965.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64A 17680 bytes
SHA-256: b2d08083e0f365e24055727c72f9652fcacb52e31d0e50afe77cce21573f9473
font_01_sfnt_off00011462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11462 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C79 10132 bytes
SHA-256: 0ca22355373457c80cc759d47887cac16cc57e8a6a37bd2d0bdb9be7bd2626a3

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