Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a8e2dc74c3830ad…

MALICIOUS

PDF

89.3 KB Created: 2021-08-11 01:37:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: a26d0ba727999b2ba9464f38af7d6008 SHA-1: 625cd6e144bbabf78721595fca6199c3693d0f11 SHA-256: 6a8e2dc74c3830ad9e834a032044be1519705383ccb9036666863a1bbd755f56
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads, indicated by the presence of a URL with a 'utm_term' parameter commonly used for tracking marketing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://irlanc.ru/uplcv?utm_term=super+smash+flash+2+1.1.0.1+beta+download PDF link annotation
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/739fd604d76ede5d1e58dfca8e70ad86/gobevewapogu.pdfIn PDF document text
    • https://moscreen.in/cmsfiles/file/wixinaxupulugepigax.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c00a5e88b---tejepuluwubefano.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/97523200201.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/20100799854.pdfIn PDF document text
    • http://fenotropil.ru/userfiles/file/31893189672.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/535bcb6e996084383a7b0e61cb1d37d4/xikisudavexijitub.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc8cc28b0f---xokejesasepugolojiz.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/qd7s7jhksraoipmb3huekud377/befifavedomog.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/5fht0ov0mvqsj2rfttjk438o6v/gudazegokijekodum.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a62937e8c6a---69289348720.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16091f5554497a---2497145212.pdfIn PDF document text
    • http://regcureguide.com/files/files/regurabuledenasogexajot.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/5hdgnfqslku5ohb3hvvb5kpnqh/magetevaba.pdfIn PDF document text
    • http://twothirdsmajority.us/clients/38522/File/wovobalagoxevedeteteb.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/33639102000.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/5732a88b2e74be570a02334e2d8d46cf/valubogen.pdfIn PDF document text
    • http://premium-h.info/files/files/razunimasekenawavavejinew.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d587a9882f---xobujokawip.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/vemunawubavuridavikubukor.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/cc58f8668d3a32436ef9ebd47776c3d1/duxukizoronitagitutax.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f118a06c42---xifisufilima.pdfIn PDF document text
    • http://eaupureinternational.com/userfiles/file/ronuluxinorudaren.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDA 11432 bytes
SHA-256: 1bfd34b0ba59d12b5e9b658f9ef11ddeacbb6e6adc4e4a23e9b28d5ec61f73b4
font_02_sfnt_off00012996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12996 17140 bytes
SHA-256: a994033faa1f122e648a1775d8e12b0c9f77316d03660f68e478cbaa47b7d8d1

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