Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae622f2b20041ea5…

MALICIOUS

PDF

80.6 KB Created: 2021-09-18 22:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 339943a915bfa85bc9bb3d6c35bca680 SHA-1: db5530cbffe1350ddfa22aa0810d0b6a070d7093 SHA-256: ae622f2b20041ea59704fd668bf7759709425771f02db99bdfaecba288f0e0d3
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/fcdf9d39d34bff7339e6b82b2aa29633/zazobutonatiruk.pdf In PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/vusobunukumumomujagela.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/49467146444.pdfIn PDF document text
    • http://lnimeina.it/userfiles/files/visabasagadomi.pdfIn PDF document text
    • https://medius.sk/userfiles/file/19623209410.pdfIn PDF document text
    • http://birkhoffhi.com/userfiles/files/34790348780.pdfIn PDF document text
    • https://ppkh.net/userfiles/file/nozawe.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613cceeb17bd8---jijaxojagot.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/walegovugegifaritapif.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/17187616083.pdfIn PDF document text
    • http://torby.kbo.pl/ckfinder/userfiles/files/58899973160.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/zezadosajus.pdfIn PDF document text
    • https://durimawar.com/contents/files/gatabobakusadab.pdfIn PDF document text
    • http://origo.ws/userfiles/file/74803991546.pdfIn PDF document text
    • http://dharkaninternational.com/survey/userfiles/files/38317942225.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/xodeje.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/41592695128.pdfIn PDF document text
    • http://juentai.com/userfiles/files/41564955846.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/86418016834.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4da4aa21a---pivawikanezod.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/penoxawewomazogo.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/24400999216.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/59520937759.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/zifama.pdfIn PDF document text
    • https://tunhuaduytan.com/upload/userfiles/files/49696414708.pdfIn PDF document text
    • https://trisyscom.com/userfiles/file/morejigafev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=fantasy+gully+apk+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF023 10612 bytes
SHA-256: 13d46706dd6d155e51eba7f8cb39a1db813ebe4a0e7aaf7d4de9e0688cb354fc
font_02_sfnt_off00010863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10863 17056 bytes
SHA-256: 9afd086ffa2577bc8af400d4e774a2ed901c93a156678ab4e5dcd56491e799df

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