Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3aea5a50ead01a0…

MALICIOUS

PDF

82.3 KB Created: 2021-07-14 01:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 04ab8148a3680a06cb93bb3779be222c SHA-1: 0d17e40bfef6078fc86872efef8dea305f6bf468 SHA-256: d3aea5a50ead01a087835e792769ac4037fe4cac0f4ea30abf2076f3ec79280b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by a machine learning classifier and ClamAV as malicious, with specific heuristics indicating it is an advance-fee scam lure. The document contains numerous links to external PDF files hosted on compromised WordPress sites, suggesting a phishing or scam campaign. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdfbf70b330---lokupuzepofuxuwinaluvefaf.pdf In PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da67c02d7f---61272925947.pdfIn PDF document text
    • https://studiorampinelli.com/file/najupeza.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/vomebaj.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/35054418687.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/tuxodinarutunoga.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/zamefuvuzunelaguzimokafex.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/d58a38c3a86eaf5d2639b4292e3d9a9f/98677628456.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/a4d90a4afe67fa712fa849aa2b9ed136/11240773682.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160b48a1211561---95347213564.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/xamexupagijuwajokofosixo.pdfIn PDF document text
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/zifenikavobitid.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/cira82molh4p1ia5q54knki271/buvakulirezatet.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/fubobatozijuziju.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160747a2010aa7---72481574160.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace74e1b5d5---27990631792.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/gofesewumajemilimes.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/1be9f6d5683a939babcbbbc04c078fe6/26263462472.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/pufoxarawawer.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/72ac40924d01967f28e6e3f4ed04ab3c/jatamuso.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/kavivemidijakuwu.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a71c169f3e---piwiterobadu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=soft+c+and+g+wordsPDF 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_off0000d7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF8 10544 bytes
SHA-256: 1e2e01dbf6fc4df6a6ff335db3838d16abc5eaf81096398c13aa141621f81940
font_02_sfnt_off000107f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F8 19708 bytes
SHA-256: 8045beb04f25d0294a4d9119562944f74370d98ebb1e1f32b22bdae16ccbffd1