Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d6f5947f193e21…

MALICIOUS

PDF

86.2 KB Created: 2021-09-04 21:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b243c23419a2d64fbd2c46fabc5a4bf1 SHA-1: e060d12bbe57003f6bc4b290436403494fb949f3 SHA-256: 03d6f5947f193e21cdd2320346ad84a1137f4e14a8a31b524d6d64147ca09744
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or redirection attempt. The document body is heavily obfuscated and unreadable, providing no direct clues to its intent beyond the presence of URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://abnicum.com/files/file/rozugetanir.pdf In PDF document text
    • https://norservis.com/files/files/86388469892.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/13553273847.pdfIn PDF document text
    • http://hornets88.com/clients/56662/File/63682899144.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/solaxosofexuk.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/zodobewadega.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/siwiromaw.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772067ea2f2---74213099384.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/ht9n5kch7vvmoa3ch301av7lk6/14562034617.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/todigobon.pdfIn PDF document text
    • http://studioturina.com/userfiles/files/muwasefajulerewoper.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/25591671620.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/wudokopowaxesajovaxez.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/8027307415.pdfIn PDF document text
    • https://beruanglucu.com/contents//files/74452816876.pdfIn PDF document text
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/16176484979.pdfIn PDF document text
    • http://billsky.ee/files/file/88798515013.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/pupivuwaguwarezup.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/dukodadaxixepejod.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/4qedlkv8rbet984fqmfo992ac2/likeviwikewizixusenev.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/lieh8a7inqmk75tv6bv18j42b0/jutizikozekawumoz.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/xikaruwijozam.pdfIn PDF document text
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/53861164545.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/d518fb2e94e6f4db2c6bf7686038e9f3/3481354490.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=new+cost+inflation+index+chart+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_off0000ea6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6D 18172 bytes
SHA-256: 451da1a3c90c5f4436d864d695a38177ccf24f749d225776c551011c871cba46
font_01_sfnt_off0001193d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1193D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13154 10880 bytes
SHA-256: d73b7635c053ca71f96eaabf98ccbd609f0da22a210f34f332996880c0078d29

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