Malicious PDF — malware analysis report

Static analysis result for SHA-256 026024fead8cd413…

MALICIOUS

PDF

77.7 KB Created: 2021-09-08 05:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 817e52fa016be6a3918e7a21dbf0d478 SHA-1: b0fd3ef282543435f5471fa37c792bd8b8f67bc4 SHA-256: 026024fead8cd413765cf3f64bac74e11f0e7376f4867747fb8c3b8af08de9be
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The document body was unreadable, but the presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://epicridesnepal.com/files/xolafipuz.pdf In PDF document text
    • https://maclashoes.it/file/kipazujawujawixe.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8dc8d547f---5492756952.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/69996392252.pdfIn PDF document text
    • http://www.skk.com.hk/admin/ckfinder/userfiles/files/60040695644.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/lagovotivotek.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a48ccca88da---48578336399.pdfIn PDF document text
    • https://paperland.bg/uploads/file/37730490515.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160889859e86e3---99846446345.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/419daf3eb4f241e7a143c04cae175993/bozizunan.pdfIn PDF document text
    • http://kpghomerepairs.com/uploads/image/files/dufurerogaworu.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160da3959e90ee---xarerekenedizelob.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/98318057851.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2c015d6d72e3e9b6d66f1737a1b3da89/67193759151.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/89941681331.pdfIn PDF document text
    • http://roxburyhs1987.com/clients/63080/File/mukazuk.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021082900441573499.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/lerilebagodalolelowu.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/96062295688.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/sagofifomijikew.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/62576406889.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/6098719689.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/90520761299.pdfIn PDF document text
    • http://jaatkinson.com/userimages/fotesewijunobuboga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=manually+manage+music+and+videos+boxPDF 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_off0000caa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA6 11028 bytes
SHA-256: f54b60ac154d4937fdab2c36d09b70b7a06233879a97d306b1ed0566de11bcbc
font_01_sfnt_off0000e417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE417 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC29 17424 bytes
SHA-256: 119792087703115f6bd97924384e0b1589282308c499e2e9e8eacbd5115d6f90

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