Malicious PDF — malware analysis report

Static analysis result for SHA-256 f696e2e09b059b44…

MALICIOUS

PDF

82.9 KB Created: 2021-09-17 10:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ee04820a3f2712a15c1244ca759cc99d SHA-1: bb7c380dc51163dd1a7bf0cdcddc8d5f1e5f3dc9 SHA-256: f696e2e09b059b44df6c99b32c93527d54176968d204ae890209aee2e96758d1
156 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting domains. The embedded URLs and PDF link farm heuristics strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=where+can+i+watch+pitch+perfect+3 PDF link annotation
    • http://shimamura-mail-order.com/userfiles/file/84778114511.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/1sam83pugggadflffo45cd2qlv/22136325870.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/tinava.pdfIn PDF document text
    • https://aiwcecckolkata.org/FCKeditor/file/8129796167.pdfIn PDF document text
    • https://jobtiara.com/files/files/35564637074.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/wojoxoli.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/dajofuludowerunap.pdfIn PDF document text
    • https://baptistfriends.org/media/zarazerozegilesiviwo.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/26068351194.pdfIn PDF document text
    • http://gyogytornasziget.hu/uploads/files/volifakawejinenusujesas.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/zefiguvagoxagiribezusi.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614111b0d4f83---vorojepo.pdfIn PDF document text
    • https://vhssirimpanam.org/ckfinder/userfiles/files/dixozefuvenemakifep.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/f0948e5f842057feab9f202cfbfa7124/mobotaju.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/nodaralijulifil.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/73643821446.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/a1595dfd8f807848603f1dac354fbd0d/dejuboliroje.pdfIn PDF document text
    • https://kochitaxirental.com/ckfinder/userfiles/files/5750910995.pdfIn PDF document text
    • http://speckletrack.com/update/editor/file/32289795092.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/fozeras.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16131b707d5852---vofuxofas.pdfIn PDF document text
    • https://clinicaalcantara.es/sites/default/files/userfiles/file/39002619415.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/wipexetaraleta.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16130bcf5be711---74801582321.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/sotedawomunix.pdfIn PDF document text
    • 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_off0000e0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CB 17352 bytes
SHA-256: 6d181b4a71d6731a173e9981dbe7fa01bd5ecb73d6333c816da1003110f82bd7
font_01_sfnt_off00010da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA1 10492 bytes
SHA-256: a1932f61d9eb04853d3c9bc7ae6ff6d356f3002acd334167f8d1de25838007ee
font_02_sfnt_off00012588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12588 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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