Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0562f9773f76f7e…

MALICIOUS

PDF

80.7 KB Created: 2021-09-20 11:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 4339306ebbc50a0a2eece6c8966201d3 SHA-1: a93be878835605bf55430293ebf80e4a0aa078b5 SHA-256: d0562f9773f76f7ee746a55b4c4f7ca9888b3f8e02e61bcf8289521a03cf4307
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs that function as a link farm, directing users to external sites. Several of these URLs point to compromised WordPress installations or disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://allytemp.ru/uplcv?utm_term=inshot+hack+apk+download PDF link annotation
    • http://duef.ru/public/file/mupox.pdfIn PDF document text
    • http://angelofthewinds.org/ckfinder/userfiles/files/53780749176.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16138427d95bb3---14947646151.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/87758368551.pdfIn PDF document text
    • http://webcertain.ca/contentupload/fckeditorUploads/organization_/file/15076324757.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b31b353e66---1093913999.pdfIn PDF document text
    • http://giorgimpianti.com/userfiles/file/66520361027.pdfIn PDF document text
    • https://papiratisk.cz/soubory/10347972094.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/42315379818.pdfIn PDF document text
    • http://galaxyjewel.cn/uploadfile/files/94823005030.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/e52l3vgi6528diob8hva6notfu/papene.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///luremonurubanavizovesov.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/kerarapibusujodelafotep.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/rowanifawudegupujuru.pdfIn PDF document text
    • http://accapierre.it/userfiles/files/99582603010.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/wevajabapefarusumavadiwa.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210919025243.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/tejan.pdfIn PDF document text
    • http://studioturina.com/userfiles/files/rajesuzasupofijufanuwu.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/36226725992.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132c782601ce---pezufule.pdfIn PDF document text
    • https://relaxbotanika.cz/ckfinder/userfiles/files/79902164533.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/xiganekos.pdfIn PDF document text
    • http://kammed.com/userfiles/file/13870164515.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_off0000d6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DA 10416 bytes
SHA-256: 34e0a71f48fb978b441bf5bc646172d1b8e76ba6d6eedf609a1dda3945ad3254
font_01_sfnt_off0000ee7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7E 18020 bytes
SHA-256: a7fcfcda1aa50733cec1486cea5e9b025ff6134eeb6c12abb59659045175ff9d
font_02_sfnt_off00011d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1