Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d3352c9bcce5889…

MALICIOUS

PDF

77.9 KB Created: 2021-08-20 05:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7253b99fc687f21b90291b59ede2524f SHA-1: 219197c5417c1d7f092463052772ab982e43b42b SHA-256: 7d3352c9bcce58894dd066610e33810e7f8f09a569391bda1bcf03885919b20d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://wastran.ru/uplcv?utm_term=joining+the+conversation+a+guide+and+handbook+for+writers PDF link annotation
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b769798f7c1---vojol.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a35a7c4ba5a---fotirozuvaje.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021080205341373499.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/bovuvodozufarezabesi.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/a35c83faa094364f28902b8d6fac7740/jeverofixewedavitajonob.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/6d597f18fbf2310003c725b5cfcfa4a9/98224732786.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/61419874495.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/peliwuliperuso.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a55eae7953---39996060559.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/96998357176.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/qm6v9v0mts97nnbg8hrv7edbvs/pizifukawatebeludijuxumu.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c7416a57eed---51810094535.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/surafifixugu.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/f160367efb0a1bb7b52f6e77f171a851/74552702199.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/18803980668.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/zijezizirevebeler.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bd15e3e6b68---6808467622.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/0f6616a22fce7141f81d3072bc18e961/mawotitefetiwaja.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbcfb187218---99703131471.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/93191000631.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/riberugujemegiwipavi.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/97fcbabe4f187a42685fed5165b0a499/duwonafupefi.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/9028884459.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

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_off0000cb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB76 16632 bytes
SHA-256: 4e23b86f5b521e1c0bf3eb4af6d34135a977df349aa5786bd28e3ea3e89d0d4f
font_01_sfnt_off0000f6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F10 11184 bytes
SHA-256: d0ac9c7883616238ae5acbb10c2afe8c24392466a2817c8d841a381730dbc069

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