Malicious PDF — malware analysis report

Static analysis result for SHA-256 66bb62fdcf60c2c2…

MALICIOUS

PDF

80.3 KB Created: 2021-09-04 17:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 83f719d0bef07eeedc101602813e653d SHA-1: 63204b6211d984946a049f899c6fd2c086f94543 SHA-256: 66bb62fdcf60c2c228aec2880fd250dbd014b7abeeba2e23b0b93485f34fc381
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a high likelihood of phishing or malware distribution. No scripts were extracted, but the structure suggests the PDF itself is designed to lure users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ca19bc7f4---mumowunulukejuzotizoxes.pdf In PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38e5178fe0---47444571161.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/e7fbf3b3ed1f4bf030f89a31a90a8de4/9310864439.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/fojeda.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/a64f6bc4159f71a0f022efbf7b8e9381/46094078989.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/788b3c70a8aeb11e66499630dfbb3966/verefeve.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/8629f77983d519f29c63d3bc75b16fa4/91084396402.pdfIn PDF document text
    • http://hongpakthai.com/ckfinder/userfiles/files/50005419486.pdfIn PDF document text
    • http://cycling-software.com/files/file/14920927447.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/vchfts17kj541nbhmc8ccn7007/15519816098.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/e77aamsg542v0e49tc2n1tose6/gozekikupenitujojaxurogod.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/xawosogojusederazapof.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/6680747242.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160958ae160fa3---nedatuxudof.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/rudusuvobepikivazale.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/6eb470ff64b69da524254d157733703b/susofuwaxopok.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/31136019374.pdfIn PDF document text
    • http://yilip.net/userData/board/file/56227900217.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/zafikafelixow.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/begavibatizaraxebivek.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/34411241346.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/guvaxixe.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/bewajadosepanonas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=aircraft+structural+dynamics+pdfPDF 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_off0000d599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD599 17508 bytes
SHA-256: e0bb33ada220463360e8c9f3e60a21c7a5e9882ead645ad64f4b1df27b235188
font_01_sfnt_off00010317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10317 10724 bytes
SHA-256: a0425578a55199af47e5fe4f915e823663fcb95a8ef3c73fb6914af53b626b02
font_02_sfnt_off00011bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.