Malicious PDF — malware analysis report

Static analysis result for SHA-256 888e74eda8adc981…

MALICIOUS

PDF

84.8 KB Created: 2021-06-25 19:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7d2a6c44db8dbb844e910a2d1b9666d2 SHA-1: 83f4f3fb7224e019bd7471abf2995ec3bcac52ff SHA-256: 888e74eda8adc9815c30b1285bc39ef8c1d8f81e0b8dcd72fec9447b18201771
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL analysis are sufficient to determine the attack pattern.

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://beautybybelief.com/admin/images/file/novikuvorawewiwod.pdf In PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/8203a547a8d7d1917b056c90175902ae/meselanogofodek.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/9f21172bdd99d6ee6b903e760c03edfa/temajoromokolovuzotuki.pdfIn PDF document text
    • https://windsbs.biz/files/file/45342538435.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/58376418924.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/16uu6rf4lrha5of9c0hs0mdsf4/49257510166.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/52858044304.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/4435677922.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/45508403119.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ee476b6bf---kijemubepexafebilawarek.pdfIn PDF document text
    • http://uppercanadatwocylinderclub.com/clients/877835/File/63009241333.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/faleduloteletunoronakib.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/guzizuwokitobodut.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/9gonmog53ppj2j8f90itn7c3r1/75968481064.pdfIn PDF document text
    • http://dwhs79.com/clients/15834/File/76381763062.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/28bb0005ad9be9059cc2a312415c4542/monifogibibuji.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/fd3b639b6ab77bf044a7feecd4194a33/96096913345.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/3jf94jbom0rcttekseiltue9k5/refijoxavimum.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/41af968a5117a16d050aaad4566f1f93/17763518674.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/67617401922.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0e212db46---vujov.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/subikepuwida.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/lisuvibudupixu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=my+pee+has+a+strong+smellPDF 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

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_off0000e987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE987 16968 bytes
SHA-256: f0a6e8a04a29c46e39902ffbc61aed568b5885f8bec928e0e24d7f7fbe78939d
font_01_sfnt_off0001155b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155B 10716 bytes
SHA-256: e633d92364616cadef01c956b757c3195fbd6eb8375b1a57569078d2103d8a3e
font_02_sfnt_off00012dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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