Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa5c24350163d654…

MALICIOUS

PDF

87.3 KB Created: 2021-09-05 19:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 695f626adc207f2a882afe0b1d0fe640 SHA-1: 9663e16ba1e2b34c1ba9de4639dbe1307124381b SHA-256: fa5c24350163d6548cabbf3505e4208aef03f9521d316e03c784f0e519452cbb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting, indicating a link farm designed to obscure the ultimate destination. The presence of a 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and multiple 'PDF_URI' firings strongly suggests a phishing or malware distribution attempt. While no scripts were directly extracted, the overall structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

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://www.urbanwaterways.info/files/49487806192.pdf In PDF document text
    • http://peterpan1996.it/userfiles/files/77525780947.pdfIn PDF document text
    • https://narellesastro.com/userfiles/files/zirom.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/mubopomake.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4035691ab---67974762386.pdfIn PDF document text
    • http://alatasfilms.gr/ILC/img/file/69544200696.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/bupofirajijiguli.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/96757910652.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/49b6253be9100d943882abfd3cf5f777/vuvenekavesemisekudovoma.pdfIn PDF document text
    • http://hosteleriayvending.com//ckfinder/userfiles/files/seromanijinidev.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080765910b7e---30260477964.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/74920833864.pdfIn PDF document text
    • https://unaizahic.com/Files/files/lorovubemewizugutiribaz.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607683b18da74---lisemebi.pdfIn PDF document text
    • http://slsnn.ru/content/file/fitukarotoralimilemepaj.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/13501177152.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce29ed0a74---87734550432.pdfIn PDF document text
    • https://jakspravnenapsa.cz/userfiles/file/misibibo.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/6d847b84f229aa5c0a4e2b8b28bd4059/85371553715.pdfIn PDF document text
    • http://hkwwta.org/userfiles/luxuki.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/862992f58935de6e4b30bb406ad63cfc/zeveretopefenomiberepido.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=unir+dos+archivos+pdf+en+un+solo+archivoPDF link annotation
    • https://lapdonline.org/file/42858405484.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_off0000ef17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10729 18584 bytes
SHA-256: cf2287884bc0401017f0cf3dec6e227ae569138213abaa3eebe6e8306c4727c8
font_02_sfnt_off00013687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13687 10792 bytes
SHA-256: 6d73a4a436a8cd6df7414ef190d7d2da4a927e3350fa9c2d3ea176286fbe065d

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