Malicious PDF — malware analysis report

Static analysis result for SHA-256 15290ed67d3191ad…

MALICIOUS

PDF

86.8 KB Created: 2021-09-14 08:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4f0ac6023307373fda4542fbf654ccae SHA-1: 65ab592ec159a6a8c7d7a20b991b8071f892c331 SHA-256: 15290ed67d3191ad4260166ef26e9036ae38fa25a22bd1887367af10289c5c21
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains numerous embedded URLs, many of which point to PDF files hosted on various domains, suggesting a link farm designed to redirect users to malicious sites. The PDF structure and embedded content are indicative of a phishing lure, likely attempting to trick users into visiting these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://westpakusa.com/phpsites/vertical_living/uploads/file/56483260735.pdf In PDF document text
    • http://rickgrisolia.com/userfiles/files/mavusewelurukunuvegobe.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/46397960616.pdfIn PDF document text
    • https://sanidom.pl/img/file/54799398219.pdfIn PDF document text
    • https://www.antoniopopolizio.it/ckfinder/userfiles/files/12422130963.pdfIn PDF document text
    • http://tonwen.org/userfiles/file/ludakakuxikata.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/47412543417.pdfIn PDF document text
    • http://ttmm.co.jp/ckfinder/userfiles/files/fosapuxinakitetosurudinu.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/namefebaxib.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed5d688f92---4742504266.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/wafafegimubedarakefakow.pdfIn PDF document text
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/67354112026.pdfIn PDF document text
    • http://chieucoingason.vn/files/nometupajub.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/19903254386.pdfIn PDF document text
    • http://www.photonics-science.com/ckfinder/userfiles/files/66350436254.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/60825789173.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/nowexiwetibowez.pdfIn PDF document text
    • http://sarljarry.com/userfiles/file/puwafas.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/xatitirubekulewusozaj.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/89239802412.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613688c1005ba---89300125879.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210911_001011.pdfIn PDF document text
    • http://modero.vn/upload/files/pimotolaxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=monokai+toolkit+appPDF 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_off0000e91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91C 20736 bytes
SHA-256: ae7bf77f64eaca1dfc296b80ed75ed39ea412355ccfd6acaaa56896c98346b83
font_01_sfnt_off00011f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AB 9928 bytes
SHA-256: 7a96c0173e9d1a4033a9dd8d8124172047dfbe6330c53b507bb1cfeb2b8f65a0

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