Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae9c4499201c061…

MALICIOUS

PDF

75.1 KB Created: 2021-09-03 21:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 993842bf78088c82e0e620c20bd2f636 SHA-1: 032e38cfe4436b44021c4679341368dd131cfe2a SHA-256: 0ae9c4499201c0612dfe824d7469e20b80cfd42ed77affde206439245da15e60
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 malware distribution attempt. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and link farm heuristics strongly indicates an attempt to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://laborke.ru/uplcv?utm_term=rhonda+byrne+the+power+book+pdf PDF link annotation
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab46cf9caf2---megirebopenu.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d52af28c4---87617877977.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/13797278343.pdfIn PDF document text
    • http://alternatifmedikal.com/img/userfiles/files/18453394996.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/pesogejovowav.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/46428367323.pdfIn PDF document text
    • http://famillespourstarlight.org/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/nekexozedasudepot.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/suvipe.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/1d4780phgmhvj2k6g3nj9gmt47/8837320048.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/f2b64fcf4f8e12457827026a962b0eee/59519922495.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16077d32837646---23551701635.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/29686013307.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/wifowagituxisikajez.pdfIn PDF document text
    • http://glotecgh.com/upload/editor/file/87947558918.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/20346840902.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/98043340343.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/744a6891f656a19cd8ee6dd870aca431/55581055719.pdfIn PDF document text
    • https://cnc-ar.ro/files/file/70310129894.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/famuziduge.pdfIn PDF document text
    • http://crackershrimp.com/file_media/file_image/file/53380191719.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/38216884443.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/086c32fda41b07987d048bbea1c51e11/momevobowoloziniv.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_off0000bece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBECE 18016 bytes
SHA-256: 46edf3332f7d9ad1c9471db97bc74237d97431d9247639474395ae965ccac5dc
font_01_sfnt_off0000edcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E2 10764 bytes
SHA-256: a7f741bd019718cc68b0185ecd422447470b2eea5db5e5eb206906955b997505

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