Malicious PDF — malware analysis report

Static analysis result for SHA-256 02aae960593a1af2…

MALICIOUS

PDF

101.7 KB Created: 2021-07-17 16:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 75a8302d7a2ad75bb28a455f72099fe7 SHA-1: 84142c69b5f93f13ed4cf202ba7c8cf2ee6cb7ba SHA-256: 02aae960593a1af2c37d56e149f9303e3fb382538109544734ff9aeecf74f1e2
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other domains, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is designed to leverage disposable hosting for link farming.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://kondicionery-dolgoprudny.ru/upload_picture/file/2049428293.pdf In PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/0d48aa2a85d93f4a932794cdbbaa91b4/leziwevenoxeripak.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/242b90c4b63976265900cad4d167bd91/60124254159.pdfIn PDF document text
    • http://pepinieramontana.ro/ckfinder/userfiles/files/tulonofezapigu.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/mekezawexisozavugoresuliv.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/vaevklvmd1jl5brcefcpvcn4p1/97829653549.pdfIn PDF document text
    • http://vrtaspol.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/kevudiz.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-4-29/20210429010734775764.pdfIn PDF document text
    • https://balarampurblock.in/ckfinder/userfiles/files/laxotoputisule.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/15381162525.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210626_155732.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5e656ddac---xobozubedowijamabe.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/15d1d1a540a04528d8759a18e913ddf1.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/kemevu.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48a722e11c---legotosigomajefov.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/12053750013.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/5fc43bd2e0dde293063b47595b1c05ec/papowagawaze.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afabc67eb92---gidepabositola.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/nadesatiwupa.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/c8f0d00b0b9a863410c9fd1347372c7f/kewexibovejot.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/278eb0a97ea5d77d7739538be844947b/bewigozuzodapakififija.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/62a1b151cb9a0347dfaed86df635c7a7/gakipegorevofubitukigiwuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=i+wrote+this+for+you+pdf+free+downloadPDF 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_off00012703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12703 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F1A 10844 bytes
SHA-256: d7b1185fa22bd6f4b4ad483d66b58c029639745ba3526fce8e66d52980b4c29b
font_02_sfnt_off00015823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15823 18600 bytes
SHA-256: 3fb6e4f30ce7a2fd21447edd728d2a2f492cf44e2d727c7164ab01368fc2d37e

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