Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e98fea5cd9b1e7d…

MALICIOUS

PDF

83.6 KB Created: 2021-07-18 10:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 62d4bf93c91a4360c53ca8c6c4a85485 SHA-1: b12864673713944d8df8f8f7510221b0f209fe78 SHA-256: 8e98fea5cd9b1e7d94077d9015f6ed8b71c8dbe6ee055d54150192d5079b4366
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS upload storage or disposable hosting. The primary purpose appears to be directing users to potentially malicious external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://jeremypourstarlight.com/clients/5/53/539822683240d2210db56c0084569a8b/File/9452333721.pdf In PDF document text
    • http://mofrantech.com/userfiles/file/2829992029.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a773fc6b937---zobivepoxuweriniku.pdfIn PDF document text
    • http://gtshotel.it/images/file/nejukato.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/87213406233.pdfIn PDF document text
    • http://sireny.net/share/files/baziniv.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe24859576---86526764089.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210718145144.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0f9fcb468---23833910819.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/88142630196.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/se1t1915nvvctuhej8olfr0e2r/ganefabubeze.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/54014393506.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c03a453076d---wuvasusetafaguxuvuz.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/66245145641.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/25705952504.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/misalobej.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/pugumaxeririzupeworinof.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/86315364427.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/12362378299.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087de5f94ce8---rigulojamitedemutitanare.pdfIn PDF document text
    • http://vaughanreunion.com/clients/7/7c/7cfe0b8ff6d5e3136a6575a9b258a09c/File/widijaxusejixewuko.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/df62c68d172efcbeffff83e68630f3c0/78159399541.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/xesofijin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=bedtime+stories+panchatantraPDF link annotation
    • 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_off0000e55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD75 10788 bytes
SHA-256: a823c64f94d731daf183b14618527340c495b993cccba394316ed0318a074e3f
font_02_sfnt_off00011616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11616 16512 bytes
SHA-256: bc2cfc247194b6b23b7132a4255171ec2b10138dbcfe9ca33a0dfc5bd2837e9c

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