Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b05c5107887a052…

MALICIOUS

PDF

85.8 KB Created: 2021-09-03 13:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fc63de1d762374455ecd897564d90ac2 SHA-1: 2de304c33ef14ba8b94553b90ac5e61e61b92e36 SHA-256: 1b05c5107887a05213178a906b207b361620a4e5d634bc21c56d115f446f9eca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://nomylo.ru/uplcv?utm_term=developing+tactics+for+listening+second+edition+pdf PDF link annotation
    • http://pwmtqatar.net/userfiles/file/zanemimixazu.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16083469b36d10---81188846081.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16128b46d904e1---41753699299.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/58708856779.pdfIn PDF document text
    • http://falls67.com/clients/50406/File/39015693519.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/23649967113.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d27d9bf49c---94761255579.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/a3742fde99e310372c57a01833b6e452/ziporulenedavibobinu.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/65006675808.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/kixizevekuwis.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/4cl5nr8fvjqiu5m15b8h46qt96/45187288398.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/68898755361.pdfIn PDF document text
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/1056001224.pdfIn PDF document text
    • http://ucity69.com/clients/861769/File/75371525012.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/0c30797258fff52509211bbeef6ea378/46067774939.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/gezamulek.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/mdkvlu6l9gqp02egtegqjp2h22/desezidela.pdfIn PDF document text
    • https://attack.lt/images/files/lipideselumumodopazapa.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/kikitenududoge.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/kopogulikotaw.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/43692498260.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/vemolorizopepejuzed.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000114bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x114BF 17620 bytes
SHA-256: 1942de84265c1d3153b7ab1e761b5697c7726376292248252db158c90f3ccd05
font_00_sfnt_off0000c8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F7 20344 bytes
SHA-256: 68d18b61b25bb4dde8cb88801c7b517ac8ecebceecf765baa2bc233117403eaa
font_03_sfnt_off00012f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F98 10864 bytes
SHA-256: 883afe9e5f59d35cfe56a74fe4ede3bfd7c6856b904d6c06da2af355855ccfb5

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