Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb9459a34307d24…

MALICIOUS

PDF

123.0 KB Created: 2021-06-12 08:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 624abc62f66eab23c4462b23d794dde8 SHA-1: 8935b5267ac2ad218342a7ee6b7173869398e15d SHA-256: 0bb9459a34307d24e51603168909cb90accf1b54410147e617d2eb1161ce47ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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=i+want+it+that+way+brooklyn+nine+nine+episode+number PDF link annotation
    • https://bataretak.com/img/files/file/gulopizufitoxol.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/12257555778.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8398bd16c6---nizakupapikifijokuxovif.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9751a9fb01---vomubepoxodovixavomi.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744787814a3---21655092765.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/femulorarigonoka.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/dd220cd9c4fee438328aacf62b80ad29/93388209363.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/e12e7558b9f2a307448eda92d300d4ce/34714701031.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/2263f54bba28b3f82b1ec06dce3919ec/begegakojofixupoxibi.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/dijibolujuri.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/manumukonoma.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/23343256851.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/64035662434.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89598230c---fimiroluzivos.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/hd7074ppihi2tishj3odgva4d3/tilol.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9bec9440e---56934734047.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/b20e2a9abb5de67729e4c7abd3b856c3/8423842683.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16488 3136 bytes
SHA-256: a9879f94c3de0370bbf099cba19345659fa3e7eff91fdea10569de354856d757
font_01_sfnt_off00016fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FBE 5416 bytes
SHA-256: e37e31d9fb8889083c7bd82cc9c5b792e01ebe959ca98e5a548b3bbff138bec5
font_02_sfnt_off000181f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181F7 3196 bytes
SHA-256: e9c67ccdd48fb6f14eb7118a476023903c199a31c08fd2a7e3d10f86c65d26e1
font_03_sfnt_off00018f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F0C 12764 bytes
SHA-256: bcd89d1a3c134c7ee3dc037bc21292be8d60b9f3acee61ee39d0d5777d468eb5
font_04_sfnt_off0001b95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B95D 16572 bytes
SHA-256: 490505ddf7570ba5858f0b4c5b2e4f0e926d97f3524785604315d66025507fd8
font_05_sfnt_off0001cfda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CFDA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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