Malicious PDF — malware analysis report

Static analysis result for SHA-256 2faec1714bf02671…

MALICIOUS

PDF

94.7 KB Created: 2021-08-14 14:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: df4d5d1fcad7e99869cd061e74458234 SHA-1: 3e7f172a4a8464e7f347f6dd900d57dcdfcf47a4 SHA-256: 2faec1714bf0267169d6f0d98fbec8fe917a9c827ccdd9cb91b4aaf4af74b917
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to various compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish for information. The embedded URLs likely serve as lures or direct users to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://medvor.ru/uplcv?utm_term=autocad+training+manual+free+pdf+download PDF link annotation
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9590293fac---kobejojeripolilamofujazon.pdfIn PDF document text
    • http://ideatity.com/ckfinder/userfiles/files/6339916703.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092af5b7c7ab---16667213527.pdfIn PDF document text
    • http://diakmelo.hu/ckfinder/userfiles/files/natumixenope.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/87357413636.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160840fc391a06---92870110521.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/tirusovaxagirosezaguvuku.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090dc767efe1---guvudefiwan.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/ronisi.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/378cbba90079eb1db706c4dfb7831824/dozanip.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097aa0bccda3---fevegokesavinivamuwerise.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/zonenotevumokoxajatufor.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/34795072288.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/4f0b6e7556e5f1ad8c5ae990bd4f1d10/27126265942.pdfIn PDF document text
    • https://sproname.com/files/userfiles/files/basik.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/b5a4885d82aef043c189c09c26d045c0/97819942318.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/q0p4dhdabgk7e4ojpt3goge7ad/38398816614.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/tuzazabowuninumoviwokal.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c8779daaa8d---gosipebitozadoxosamomus.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/5531b93ada151057b3e3ee1442cc98d2/sagepofujono.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/56059069800.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/xazoresulovapev.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/14197280145.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcbdd1358e2---16508517789.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_off00010879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10879 19392 bytes
SHA-256: 979b1192617d9b36d4214e5ba5aa810b23408f6d233bcb029be4a807be331d36
font_01_sfnt_off00013a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15269 10960 bytes
SHA-256: 60987dc9d80e61bbe921c34eabf74209bb155c4896c227a9313cd73c4ea144ec

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