Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d50ee238fc6b2d2…

MALICIOUS

PDF

85.3 KB Created: 2021-06-26 20:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 08f5e5203fa48586ec665c08e3721ebe SHA-1: 14fa06d8bb61ebcaaf5251da24ad5d1de2265a14 SHA-256: 9d50ee238fc6b2d20e4f9933756ef922ebce033394dd6f35fd900dacdebc638f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs, many pointing to compromised WordPress sites, designed to redirect users to phishing or malicious content. The presence of multiple external URIs and link farm heuristics indicates a phishing or credential harvesting attempt.

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 https://queure.ru/uplcv?utm_term=native+american+thanksgiving
    • https://cottonweb.net/userfiles/file/72584559343.pdf
    • http://say-international.eu/userfiles/file/8748463055.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/qdftr9qj5tb2d2i7rhmv4vblj2/69427605667.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29e68328c2---ranololekivesep.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2942dcda01---96875255438.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/cbd9ct1860t4536dk91p630s04/69217754398.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d4970e2c3---gopuxisepudabogaje.pdf
    • http://tai-yang.tw/taiyang/upload/file/28146638441.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609633e7f2b81---mawojijam.pdf
    • https://celebicatering.com/upload/ckfinder/files/94847512989.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780dba2799b---35793386736.pdf
    • https://cooperspick.com/files/87546979925.pdf
    • http://apexibd.com/uploads/fck_uploads/file/16080546743.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080b2b0b08b3---sopajotakejokodarodosa.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b66bcc2f35---10591949205.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/b529ed9c2fa63490a561105c80bab0bf/38493156589.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1608af951db888---88620226242.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/1c4dee4ee2d984f2257761b9f93ced1d/wafazizat.pdf
    • https://asthasupermarket.com/userfiles/file/1355917234.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/c63729e2a59887ee1f6bc940a5789ada/fifapujejiwumukaduwolivaf.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc9b67de09---nujomefiwa.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8b4f10e61---jegojuvogugurojeruxizit.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098a90a67b6a---99716789058.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb9e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9E 16792 bytes
font_01_sfnt_off000103b0.bin
5cdf91de18009b720ab0edaedf1a4ef38fecf22bf0427ff1261284dd627bedd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x103B0 16976 bytes
font_02_sfnt_off00012fdb.bin
a703a22e1debdee52c702a1de418e9429ae162472e10c72cb2e0b148334e999f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FDB 10648 bytes