Malicious PDF — malware analysis report

Static analysis result for SHA-256 45afec01deb811f2…

MALICIOUS

PDF

72.4 KB Created: 2021-09-03 05:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: d9c845a99e945be942fe41a662fd306b SHA-1: 006561a84ae57377163ba5c908cf3ef7159256dc SHA-256: 45afec01deb811f265441b28109cf2c9e2365f5dfd8e2654eed930cc38976f80
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://philabc.ru/uplcv?utm_term=adrenergic+drugs+notes+pdf PDF link annotation
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/45052381289.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/ml4u3p7u6dbhobeg6529ts3skf/gedibixelobal.pdfIn PDF document text
    • http://whatdwellswithin.com/file/43296559096.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/5ce31438bdae8b63869481afd7458079/danubuxipenafexelawumupan.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b080bc6ae---51973298508.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/6c5990e96dfc35835796e5f38deaeeee/47541780460.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/32233761258.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/97920327060.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/6732748052.pdfIn PDF document text
    • http://highgaincomposites.com/img/file/2021829131727.pdfIn PDF document text
    • http://1544-7419.net/upload/fckeditor/file/pofofabojesiduxoxop.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/79118290722.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982f7f6d863---xaxupidavimomepefurufo.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f0be3ab85---vonizaxekipekaregabukumek.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a005a7e2917---78737957333.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/65836585725.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/38937370272.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c910cb9d6c---86729452702.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/nukagogole.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/94507181682.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/gozutarubapusanumo.pdfIn PDF document text
    • https://baobiachau.com/luutru/files/46999707130.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8d4f6a1b95---70997310929.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_off0000b6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF08 17428 bytes
SHA-256: 1751934100f4ae6db2e44a5ef3aa8d7549c5c19dc29775176e7adb378b31ebdb
font_02_sfnt_off0000fbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDD 10668 bytes
SHA-256: 6d224e20aead80711c075a45169e02741b7c26f2d15e1f06a32daa01c81eadff

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