Malicious PDF — malware analysis report

Static analysis result for SHA-256 48042c285615a198…

MALICIOUS

PDF

83.2 KB Created: 2021-07-09 06:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 424b5fd36b0fab1d7bfb7cbf4f5f1b66 SHA-1: df65129e472b508c309ae23d1189e52d78577a67 SHA-256: 48042c285615a19803e1a683281df7439d5c2c6492c5ecaa47114d97b5be0da4
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, with the PDF being identified as a phishing trojan. The presence of numerous links on potentially compromised infrastructure suggests a broad phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6aa8f3e90---62822759817.pdf In PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d86d41e24---60098833573.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/e37d18396ae45aac5ac9cbb312c66591/74239852320.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/3204ea73b8f856e378c79a5bafb6ab12/zunisarisejileb.pdfIn PDF document text
    • https://irantruck.ir/data/file/nodesogepufe.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/77724728480.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/7691529489.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a82ef636047---masat.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/75279183049.pdfIn PDF document text
    • http://quocteanviet.com/img-chamthi/files/63652984010.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071303fab8af---vuloremezosi.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16077bb0e09d8f---64727746326.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e21dade467c---rimutivinir.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/lokukulafakogirojilafog.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/wunukitu.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/49ggo5c37r6s019k8j4p7gcn14/72388782020.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/juripitubivusabuxir.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/43327958179.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/folabuxilojuziremefivin.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/nd64urm7lhc8sifj7cktfvgl82/11127028391.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/07551029f70ff9af0a4f343412cca9b1/xofuxofituv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=install+google+play+service+for+genymotionPDF 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_off0000de53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE53 10952 bytes
SHA-256: 72e2ded7ae83d3973342313ee4322bd8ddf52103a40da359da0f5c538741327c
font_01_sfnt_off0000f7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD4 17992 bytes
SHA-256: 8b6467092b236dc8ffbf13b3a0a44206cdc987f8d5e33267a0f9b4c505a45308

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