Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe920c5377b0ccd1…

MALICIOUS

PDF

68.7 KB Created: 2021-09-26 05:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 51bd4f14c2a3893204cb247d4e66c7f5 SHA-1: 0aa63f80695989d12556755cb48cd10b3a8ebe27 SHA-256: fe920c5377b0ccd1e69fd7f45f965d1c2cec43bd5eb456c72e040b00b6eefcd7
126 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 high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to disposable hosting and utilizing UTM parameters, strongly suggests a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://philabc.ru/uplcv?utm_term=top+ten+keyboard+for+android PDF link annotation
    • https://steklo-shik.ru/userfiles/file/65022884127.pdfIn PDF document text
    • https://grandiosieventinuziali.it/filesUploads/file/47151250356.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/20122135666.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614f3785f0d8d---fanebuveja.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/21711590786.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/fuwiwemajuzapufi.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/2021982325125792.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/filel.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/c4f455bfef00da05fc984364237b770a/xikuzejagoviked.pdfIn PDF document text
    • http://hermanosgolbano.com/admin/fckeditor/editor/filemanager/connectors/phpfile/16558346148.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/65589636314.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/66863723718.pdfIn PDF document text
    • http://vinhomescaurao.info/app/webroot/img/files/83737363594.pdfIn PDF document text
    • http://ifap.it/images/file/tutitaxudewofenerinijage.pdfIn PDF document text
    • https://find-domain.lazy-online-shop.com/app/webroot/userfiles/files/janosisezo.pdfIn PDF document text
    • https://digireg.sk/upload/73195687913.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/73659266070.pdfIn PDF document text
    • http://nachhilfeschule.havonix.com/ckfinder/userfiles/files/70357422473.pdfIn PDF document text
    • http://szm.hu/userfiles/file/92115155203.pdfIn PDF document text
    • http://lovesenergy.nl/file/94090733846.pdfIn PDF document text
    • https://tenfci.net/userfiles/file/ruwilefijaman.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/tovotomikiduwa.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/gokaserugovajepobokatev.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_off0000ada2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B9 10588 bytes
SHA-256: 8475f083bd1da76a78c9b389ec43e0f15890f395efdfb77e1d092001ac072870
font_02_sfnt_off0000ddd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD0 15556 bytes
SHA-256: 1523dca698bebb9ad840389f5aa4d70085f49be69e737a72301610ffe48cbfaf

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