Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e2605802c117a9e…

MALICIOUS

PDF

81.4 KB Created: 2021-08-31 22:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5ec6ac2de79d689a1782cb2240104ad6 SHA-1: 5cb743d887f61a074420c5f9c4548e16f6e69b98 SHA-256: 1e2605802c117a9edc51711b66fefb8c06b68ea167b2ceada2f81dc422eee9ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a spearphishing attachment used to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://crysiq.ru/uplcv?utm_term=examples+of+hydropower+use PDF link annotation
    • https://habibitours.net/ckfinder/userfiles/files/16605491057.pdfIn PDF document text
    • https://yourdentist.ro/app/webroot/files/userfiles/files/ganijozedisi.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f31a898c6d---85780677920.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/f6hfreh2ek1kgo2r2bspkvkae0/zidirorubuxolujav.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096f4fec0a7f---xomivotinojad.pdfIn PDF document text
    • http://metzlerranch.com/userimages/vavodavu.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/1ukboge7uaj5kcusn440uqmij0/17723047987.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/32161947515.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/korativebazugitudoxojo.pdfIn PDF document text
    • http://njf724.com/basefile/janatalnajafcom/files/55717678455.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/30fbbd9a6ccaff1166a875212b67eeb7/biditabab.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/96318592018.pdfIn PDF document text
    • http://gewald.ru/content/Files/muzapuxowofonovaxogera.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210830_192317.pdfIn PDF document text
    • http://armanetti.com/images/42557703114.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4cdb452091---39713879376.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/4bf089b27cdb28e5ddb400f706bf0ca6/74487092605.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/76321148874.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/winidawefudoxelurixep.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/df039b6245bb0497138cf37361f11309/tigupufijozolojebavoguma.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/65728418479d0fc419e112d2c67766e2/5819702783.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/0c029ae9a50811e6000572125db3b8f3/nawuvajutataxubomeviwir.pdfIn PDF document text
    • http://studioingtassinari.eu/userfiles/files/vusapudejovaxujal.pdfIn PDF document text
    • http://ontsgoi.shop/uploads/files/76263578205.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_off0000da69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27B 17080 bytes
SHA-256: b0fbe8d7a8e5aa81d72f73f9d2446e362a3e41fa90cf1c0b7a04c86cef5caa39
font_02_sfnt_off00011e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E92 10856 bytes
SHA-256: 2218d93ce693ef59eab245d5bdf15ada287e42894f593e62f228973a37a94c9b

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