Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f4c79d2e2efe4fb…

MALICIOUS

PDF

77.4 KB Created: 2021-09-07 10:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 59164378a8b4cebea6f1cbeb6773e3a8 SHA-1: c497816b48754dea903bd79ce84391ca1d4710a3 SHA-256: 6f4c79d2e2efe4fb1ff09e3987fd8cbd8f6be809d69980496017acb71e9535ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to various domains, suggesting it functions as a link farm designed to redirect users to potentially harmful websites. The presence of external URIs and compromised CMS upload links indicates a deliberate effort to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://pixomot.ru/uplcv?utm_term=ncert+solutions+class+12+chemistry+alcohol+phenol+ether+pdf PDF link annotation
    • http://jnnycc.org/userfiles/file/jesudewipulazixetenifasez.pdfIn PDF document text
    • https://ladida.asia/sporlegen/administrator/imagetempfile/zosowamoz.pdfIn PDF document text
    • http://cnkls.com/userfiles/file/1627244342.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/58121163816.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c058fd837b---lirabamebe.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/ipc8f72g251t05b5arimrcsr20/buzojapederaguviva.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc758496d6---lufojefoxubibewerevos.pdfIn PDF document text
    • https://beaszemin.com/files/32265015994.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16135386c256bf---jelopazejoloxerizo.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/38152556953.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/sizovowidunulivilesabo.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa6739926c---95727396505.pdfIn PDF document text
    • https://edcasys.com/ci/userfiles/files/viseduxawinexidot.pdfIn PDF document text
    • http://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/majemiwebovaxo.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/24159980079.pdfIn PDF document text
    • https://navoloki.mebel18.com/uploads/files/roruvigelolumomabiloki.pdfIn PDF document text
    • https://tch.lu/files/files/fiwagigew.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/s2u8l3ls3v25m3co1brjbe17kf/65911068712.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c3ca0ef41---60048119094.pdfIn PDF document text
    • https://tpk-m.ru/files/file/darasawotafa.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/007e66f6151d9fee14fb9295d2241b38/xekigizavujo.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/86e1efb1f14c699464818df8e166116a/jupeliwikaxajeduwajanero.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_off0000c80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80F 17848 bytes
SHA-256: fde0dfffc93f0655fce09677d24dcfefbb684d820fa89fffd1c2431c619509a8
font_01_sfnt_off0000f5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010db8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB8 11248 bytes
SHA-256: 451159e05e3f440edaa60e0b78549e29dbafba78eb7dd8c318e8321b8484cfec

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