Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ecb6e4c9d89afdd…

MALICIOUS

PDF

86.7 KB Created: 2021-09-01 11:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: af87f877ad14ce1ab10aafc7bd940825 SHA-1: 7d65608e2feda339689cf63d1f6a4eda167c3b9a SHA-256: 9ecb6e4c9d89afddd072116da606aa210cc51c57af032bc5d52a4f5e05da871f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple external URIs and link farm characteristics points towards an effort to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://nomylo.ru/uplcv?utm_term=proverbs+in+things+fall+apart+explained PDF link annotation
    • https://pharmalogindia.in/ckfinder/userfiles/files/tinutivotipojipumijad.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef4f5ac970---96463028653.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/mezufukopasiku.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f930fd2162d9e09431cefac8d61bf73d/61593085458.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/63027766921.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160821104dbb3a---donamusigutuberexinowox.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/c6ckqlsirpsvr6iicrllsc5ca5/29641215297.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/dixoweralagororix.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/96246039500.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/xawogamukumemezo.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f67673452c2---26396947075.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/64449321393.pdfIn PDF document text
    • https://www.tvmreza.tv/ckfinder/userfiles/files/zitowamek.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079133d76a7d---buxigovibewokutuzofiku.pdfIn PDF document text
    • http://hfnhsw.com/upload/files/81096379431.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/33d75b83e495df76e333b7388f203e89/nivimavimexufok.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/fef459ec5f4454e15c8648abfdedfbf8/1636472242.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/286f7f59307ad9e1d6e1bf9369d09e9f/bibozadenamezelaj.pdfIn PDF document text
    • http://fenotropil.ru/userfiles/file/kimutigovokozesarinu.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/5d7289458d742e073f9f082675aa2e0c/15610733942.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607b20ab32a32---55589342711.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607623f96bbcc---70665222725.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/2483795722.pdfIn PDF document text
    • http://cosyromania.com/media/file/66977404354.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/73806536782.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/xijotutepimalitewutuz.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_off0000e9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B7 11088 bytes
SHA-256: 49a84b381ca7552a890cc5dab06867cdf7455c5729c4785ebacf8ae8ca7c029e
font_02_sfnt_off00011b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1A 18464 bytes
SHA-256: 0bda993a1321cee83dc5c4ff5451a6246bd6348bcc6295413d7051c957710339

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