Malicious PDF — malware analysis report

Static analysis result for SHA-256 97194308ba4111fc…

MALICIOUS

PDF

97.6 KB Created: 2021-06-26 03:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c156eeee07dbdfccafa2746f372f0c4f SHA-1: 7bcbd838a74c807a646e1e614ff9fdf0d7b62b29 SHA-256: 97194308ba4111fcde3d33a91dcbd9e6a7d6624b2ae63ecf4044443e73e48b1c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of numerous links pointing to compromised WordPress uploads and disposable hosting further suggests a phishing or malware distribution attempt. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=basic+person+drawing
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/fle22m057gaerqnsg47dv2un43/57137505921.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/a12e5e0f3a0373e1ab6b56e3a71d9fbd/40504180789.pdf
    • http://smartvoicecom.com/userfiles/16783759367.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/17bf5fed429c808c35810b22d711a9ca/ponujofedavolewega.pdf
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/wimupexidejodisuvodikenes.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1075ecbd88---50234789771.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c52630ba5---bonofuxupote.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d582f17f4---tupaxak.pdf
    • http://anthonyvienna.com/sites/default/files/file/liladagewik.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9fcea893b---wabepesajufigonik.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083b86b8f3be---67632678889.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/cb77503ad0f597aafc3d4563dad40603/jametuvugub.pdf
    • https://papiratisk.cz/soubory/dovirigolifakuvititel.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/2056c8efa941c1fad028fa6f3197fb60/54578120780.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bad135a4d46---81405848976.pdf
    • https://africanresearchcenter.com/userfiles/file/17146545526.pdf
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/46444884530.pdf
    • http://sosnovgeo.ru/userfiles/file/vugewodez.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/tshb7kn1hv7n6b423tbnbjeod3/ziranebafavopifo.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3aa1355ad1---84717628747.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/3ae2b2658eb3af5da80529d935586588/toluredokisus.pdf
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/39f7b40bce24e360cf8e7e12acb4a598/jajebosabogap.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087329e85e98---78302389449.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/sng1kt9cnbq31ivhj6b5b6vief/86236631534.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011cdb.bin
55071b4a8e20244d9a7a0237b4a4be8f3ee37f59a281892bf5014e3ed9d9ed4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDB 16844 bytes
font_01_sfnt_off000148c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148C7 16792 bytes
font_02_sfnt_off000160de.bin
ec9239d465d5cf49b52b94999afa6764a474d19333625874eab57392240b66fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160DE 10684 bytes

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