Malicious PDF — malware analysis report

Static analysis result for SHA-256 44582750909d4fb3…

MALICIOUS

PDF

75.2 KB Created: 2021-10-13 15:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 9b6dc87a4e049c9737fdd8ba96188cf2 SHA-1: aa946873843340cd4e77cf0f5d22c86b6771436b SHA-256: 44582750909d4fb344a354dfa21223efc8ba0e8a74b4410708df42796db3e0ec
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution campaign. The PDF structure and embedded URLs align with common tactics for delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drafthe.ru/uplcv?utm_term=1+to+50+numbers+in+english+pdf PDF link annotation
    • https://pgprojekt.pl/Upload/file/zoputebipi.pdfIn PDF document text
    • https://maviet.vn/upload/files/517369066.pdfIn PDF document text
    • http://radio-salsa.fr/php/rs/filesupload/file/kesiwigugorepijutawu.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/31800281645.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/24441922281.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/14256547810.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/pumodaratawowumusorojij.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/tesiperejirogud.pdfIn PDF document text
    • https://gornjastubica.hr/files/mevepalijelotudizem.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/19260d7a4a03cfe1f9f5b86d7c85deeb/85037390588.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/gurejefiledupo.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/73177664459.pdfIn PDF document text
    • https://saptabangunmanunggal.com/indomobils/upload/file/55116930955.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/mezet.pdfIn PDF document text
    • http://directartdeal.com/uploaded_files/userfiles/files/butami.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/34232375600.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/mizorezakaverisexa.pdfIn PDF document text
    • http://seoaudytor.pl/userfiles/file/77544809717.pdfIn PDF document text
    • http://efuturesthai.com/uploads/files/43621552627.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/nuvinivopunererixozo.pdfIn PDF document text
    • http://standardamulet.com/files/files/pewivijat.pdfIn PDF document text
    • http://nomayaku.com/userfiles/file/15663133570.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_off0000c10e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC10E 17404 bytes
SHA-256: 1a3d6d78a3e9a6cceefaad556e19bb59bb6c59c05c285c2a4c2e8409041b3abb
font_01_sfnt_off0000edc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D7 11232 bytes
SHA-256: ff20840662146f2a6f64dfc775ae2556c5f399e92de67c55fdd427ad84a323d2

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