Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe09e4e384cb4f9…

MALICIOUS

PDF

82.9 KB Created: 2021-09-01 11:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f88ce65af0787784c528a09cfc464c3f SHA-1: 7c7202a44542ff56c45be634bec69b7c29a21172 SHA-256: afe09e4e384cb4f9c1a6e87fa66721b0188c18ae54bbf88423d87a621f1559c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. These links likely serve as lures for phishing attacks or to distribute further malware. No scripts were extracted from this sample, but the presence of multiple external URIs and compromised hosting suggests a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://archism.ru/uplcv?utm_term=145+lbs+convert+to+kg PDF link annotation
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/6m4dv2son5dplm8efi7p6eh3o6/pejasevusixevol.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/sisirobowugovamabuwutejub.pdfIn PDF document text
    • http://viajesalaos.com/webroot/img/files/nizuwevipuzuzu.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/gozaj.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef8ac74d24---mukuvezud.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbbc866df9---16888162966.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/tunipunikosi.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/ac1a33c8d7f7578d4248b66eafed0cee/muluvitikivawedovavimo.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/98887263588.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e32751d464---48224702245.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d7da0a8bb---luluzip.pdfIn PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/7482071269.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/mutamenupalow.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160799331a3150---82012352344.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/fb7b704ddf412dd104d2ced684402bad/nejudano.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/ruvadodoparuref.pdfIn PDF document text
    • http://charontrade.hu/data/file/kadupus.pdfIn PDF document text
    • http://dietmoiquangle.com/webroot/img/files/91407681545.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/7skdl5t5kveelmfd76n5892as1/gejava.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/50ea7jogt0cq6urpc5jahjus27/46263153772.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160744b7d3f09e---zuxopu.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e5b956ca7ee---rasenedarifisimavedawega.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/bovusuxekarolonoselobevo.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/lds7gp5pia4k0u16serra0g0ab/wanuzujogabano.pdfIn PDF document text
    • http://pasted-radio.de/web/files/fiwog.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_off0000db79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38B 18892 bytes
SHA-256: 665d57bd3f7b29f9c8c0e301285fb907ab80bf18e711cfe4d93b47d0d8025d91
font_02_sfnt_off0001251e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251E 10616 bytes
SHA-256: b1ed85655944529732604c964874456f7aeeee03c1e7bee978d6dff58864913b

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