Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04d07ff075eb3a1…

MALICIOUS

PDF

79.9 KB Created: 2021-09-17 15:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 570598fc0614addb663d1d63bf06c8f0 SHA-1: c0b2b6c58e858e6a1f258841236e57393f44cce8 SHA-256: d04d07ff075eb3a10a4bdd0337f88185b27fd8b8be3f5b186f34bd5b5ac4e3bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the embedded URLs and the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://rtquery.reitoken.org/Coaching123/images/files/94739628875.pdf In PDF document text
    • https://krainaogrodow.eu/zdjecia/fck/file/61314686985.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/161318e7cc1a0a---lutatipufitiruxe.pdfIn PDF document text
    • https://themalc.org/files/file/26660222038.pdfIn PDF document text
    • http://benly-carson.com/product/files/wikimotapopuziluv.pdfIn PDF document text
    • http://ediliziaunoaventi.com/userfiles/files/82756188406.pdfIn PDF document text
    • http://keyday.ru/files/files/vofikasafuzesu.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/xalipulebabim.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161425f143325e.pdfIn PDF document text
    • https://petek.biz/resimler/files/direlo.pdfIn PDF document text
    • http://mcrlclient.gilcom.ro/ckfinder/userfiles/files/47253757850.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/33888027541.pdfIn PDF document text
    • https://advik.net/userfiles/file/fodavexiv.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16141ed87b7a07---pipusiwikujiturato.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/et5ci36b0mrovbdnoqoccnqhor/tupide.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/bavofusenarukufupubovoji.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161415a4430c61---18973603980.pdfIn PDF document text
    • http://freetds.net/userfiles/file/9919374316.pdfIn PDF document text
    • https://umutisi.com/umut/upload/files/xavibenawuwawonubetol.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/guzomifojijelasaxikovar.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/tafiwazuxijezuxobasutug.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/nibefojeti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=the+walking+dead+season+1+episode+2+download+androidPDF 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_off0000c99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99C 21608 bytes
SHA-256: 8d7c0c4b28e3e58309a90d6c73d6a8720f17c63d53460bbcf5a004c1bae5c649
font_01_sfnt_off00010054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10054 10884 bytes
SHA-256: fe62f2adc6072e88117387652f77719fe2286c91e5a0a791fd551954439a4aa7
font_02_sfnt_off00011957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11957 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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