Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a9e9769e225ac3…

MALICIOUS

PDF

91.0 KB Created: 2021-09-07 02:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e324eed73b26853df5a381f805f53ac4 SHA-1: 2c2e10054bf38f523face8bc2aadb39563d7272a SHA-256: 64a9e9769e225ac3c0180acc0d6d29960f576ca77c6d27ca6d5423061abf99c9
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

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://aykutemlak.com/upload/ckfinder/files/85498410040.pdf In PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/79800e7ec5c24e54112849570353fbca/xifis.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/it93mkani1gikibdto0s0u3sv3/25255610146.pdfIn PDF document text
    • http://planbmedia.hufiles/piminomitufezosomuliju.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e94a2b914b---40835454587.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/10541755899.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/1752980b3b63a931b5b04bb8dfd03bfe/zorow.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/45129251404.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/11879304497.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c72c82a71---situgizuxuma.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/55640961775.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16093d3175a628---50792412183.pdfIn PDF document text
    • https://oumkua.com/userfiles/file/96739011807.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/gilitemolupegoruwet.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/nukulolupujiluputufes.pdfIn PDF document text
    • http://denda.co.kr/ckfinder/userfiles/files/72608836531.pdfIn PDF document text
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/16022423366.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/9304628073.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/69497358878.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/e412e26e6105fe3856a7c4b8f767b337/gananafivezajuru.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/23614931904.pdfIn PDF document text
    • https://ahha.az/userfiles/file/73250597270.pdfIn PDF document text
    • http://zkpower.net/upload/files/ganopositasuwomoxabenode.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=exercices+de+comprehension+ecrite+pour+les+debutants+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

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_off0000f524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF524 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D36 22004 bytes
SHA-256: 35294f1a03105dfd91d93570dcadd825ec9c0857808386c2e6a24e25127df503
font_02_sfnt_off000143a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143A4 11208 bytes
SHA-256: d1e1e44ef7f494456564f24ec871076ace5e0d7a70f73b557519d3d41915efa2

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