Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf7bde7512bbc85…

MALICIOUS

PDF

88.2 KB Created: 2021-07-31 05:30:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9c0d64c9c7f57cd7bd2a6c823867fff2 SHA-1: 47c4128ba64c3f9ddc1f594e72a8a47293c5e23e SHA-256: 1cf7bde7512bbc85c105b0525d6141d917c28f2727696d39c38b746c262ba37c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs, such as http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce4afd73fd1---70203485641.pdf, are likely intended to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce4afd73fd1---70203485641.pdf In PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9ccdd403a3af8e928fd949a2de8b799c/93975992345.pdfIn PDF document text
    • https://taxiparga.com/wp-content/plugins/super-forms/uploads/php/files/427f462292fdf4873cb8caab7a66c2f3/votunuj.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/mebepevaxobozifimodusok.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac001c0f42a---93568556622.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/eccbffb38b8631b7fd9997f41aa4a818/zabosilisovixel.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/tizugoverav.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/630f44d10dcce4c08c47c69fd7b3d7c1.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/kibikefanikulajagimoxe.pdfIn PDF document text
    • https://renault-service.com/userfiles/giranuzomigedevumuwik.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac224998e3e---damekoboworekofiropusow.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c14b91d37---lusowigasuka.pdfIn PDF document text
    • http://novichiha.ru/pic/file/venogabok.pdfIn PDF document text
    • http://apcmagon.com/userfiles/netevenipuxatadalelexone.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/fr1krs6s7oclqf3ek3ltue01b7/duwonabawisof.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/vakasitoxif.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/78575393728.pdfIn PDF document text
    • http://thaimassageboy.com/ckfinder/userfiles/files/54387286147.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4b1a6c330---jemebexafi.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/d0e0h4md6u1k8gio7m0n0sc3nc/jiregekikurosef.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/fe555c059f055335720672f385a22fc8/6084277610.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/56527296575.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/02053132243.pdfIn PDF document text
    • http://xinyuemu.net/assets/202106/files/20210608104457938422.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=odhani+odhu+to+udh+udh+jaye+mp3+song+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D0 17420 bytes
SHA-256: 1d508a1eab47aad0503be93109f81afe6f58cda4a6cc131bc5b01d04794c3e8e
font_02_sfnt_off0001210b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210B 11572 bytes
SHA-256: 9b972a0bde089bd497c81e11ef24c2a2504a164da26807ad6dc1918bbe893f17
font_03_sfnt_off00013c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C2B 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467

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