Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdad854739938d70…

MALICIOUS

PDF

146.6 KB Created: 2021-07-06 00:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a8486cd2cf5648b8a30edfe1c03d13fc SHA-1: 9d4e9987e367f727ddd9d896e312708630d00022 SHA-256: bdad854739938d70832688d74db3110de4b29df8720fa6ead7d792a7880c184b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs pointing to compromised WordPress sites and disposable hosting, characteristic of a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/b3141acec87dc7a2980bf1c90ccbe069/rukumofegenebaxomu.pdf In PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/59hjtehbnajr6oddgfs789vm7c/34544403525.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c7fe71b70---78184706327.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/3078794949.pdfIn PDF document text
    • http://dichvuhieuchuan.com/upload/files/48199435347.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/56935412946.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094dc8cb0643---86125567969.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/7l3ukuqer9kqn3rmoqvhgtsu68/xaxukaxafibinij.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/89525714680.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/lekewefamaguzakuvimavawon.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/62813581097.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160891a96c8e7d---kudutegetox.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/5fc30f93915d092ec1ac12f3202ecb0b/52018148663.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/9fdd9d367c7e412c9ff65fb939e0cbb9/57215270188.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/52082472209.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160970384d6799---gumezadubaragajokumutenun.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/067a04862d170bf5d9a9e58e85115d6c/52117379782.pdfIn PDF document text
    • http://dade666.com/userfiles/202106file/2021061119543370554.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/1688749139.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3cec23cda---ravarazuxubekafibesog.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160796b163010e---nidimetiwimifeliwalosim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=radians+to+arcminutesPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001de22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001f639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F639 10628 bytes
SHA-256: 9f45236dd9f656f3ac8d307087824aa2440c425289bef40a2bb865d6acf3cb82
font_02_sfnt_off00020e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20E89 17984 bytes
SHA-256: d54e07b253cec4c794666a7ced948480ed567628d61f5d18f9545cd459c9f97b

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