Malicious PDF — malware analysis report

Static analysis result for SHA-256 08557ded93bc472b…

MALICIOUS

PDF

80.9 KB Created: 2021-09-15 23:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 006179914aac882dd9a978a795051411 SHA-1: ccb3b17438807573f94a6f605cc3ce6e531de36f SHA-256: 08557ded93bc472bc488299aed481cc8c50c1c03faddc82f5076a990c90cdff4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which are hosted on potentially disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded content, though heavily obfuscated, are consistent with attempts to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://kingbikeonline.com/images/upload/File/64515679675.pdf In PDF document text
    • https://pmsp-me.com/userfiles/files/39532201686.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/26438013407.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/vosoromitibivefod.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/57222209043.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/59191192278.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/45573974020.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f03b70534a---68892649816.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/80091419322.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/72168752410.pdfIn PDF document text
    • https://transmilenio.net/datamont/userfiles/file/84124286612.pdfIn PDF document text
    • http://twgo8.com/uploads/base/files/202109111135569628.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/35203169000.pdfIn PDF document text
    • http://honghuibio.com/d/files/63078450395.pdfIn PDF document text
    • http://xn--z92bzy85x.com/userData/board/file/24460513892.pdfIn PDF document text
    • http://achilleferolla.it/userfiles/files/pozupemenonupuzulopuxor.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/powuxeto.pdfIn PDF document text
    • https://podgoricki-klub.me/userfiles/file/levilofigeguribepi.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/lemozujedop.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16141a9cd80935---14665733906.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/69916895458.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/77210499690.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/badudesa.pdfIn PDF document text
    • https://emenu.hu/editor_up/48434348717.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/13903321651.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=fortnite+mobile+apk+no+human+verificationPDF link annotation
    • 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_off0000d7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CD 10952 bytes
SHA-256: 95d763806fbac00695db751d9730926b2eb6f1eef334a79a007842503e294fbb
font_01_sfnt_off0000f0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BE 17260 bytes
SHA-256: ce03e59529ad25f790139752a34e2ac722f63dba0b719d77ce294072875ff46a
font_02_sfnt_off00011d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1