Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29f98c610a45de7…

MALICIOUS

PDF

82.6 KB Created: 2021-09-04 20:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d3d45521fafe2da0e53d528259098fa8 SHA-1: c04ddfbb23b385c5d4cd09f36704459ca3fad3b0 SHA-256: d29f98c610a45de7cdb797cec76833acd59435fc79a968963a5d789cddedd072
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure suggest an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://mousike.it/img_ins/files/vezuwat.pdf In PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8bbe6434c---89829039821.pdfPDF link annotation
    • https://aawyx.com/sites/default/imageuser/file/bofopadeluratujulinod.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/3be9553060abb5a11ae2c43b758a6573/66062265758.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/tixajidefijerekidu.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16082d9f152563---9061244424.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/dejudibobujedixu.pdfIn PDF document text
    • http://optykglowacki.pl/obrazki/files/tireburipu.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/11081733159.pdfIn PDF document text
    • http://kleiberit.ru/files/file/34482666602.pdfIn PDF document text
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/570a7f0727a4b73f85dcf56878d8c074/93120153357.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/23452810209.pdfIn PDF document text
    • http://burmeseburmilla-allevamento.com/userfiles/files/3650991035.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/vogalodukopozepunanegoso.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/d7c362121d0a1153b9f47f3a4dfe4ca1/gebuzubuzirekixebesazo.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/15459a66f99b7a18d435763028ace539/95914799418.pdfIn PDF document text
    • http://domexpo.ru/up/file/kagesadozegokudesisitil.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/rifesurewavogisozolexef.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0178383c8---29964421421.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfc7c916e5---baxuwakafosodiz.pdfIn PDF document text
    • http://burrburroughsfamily.com/clients/55468/File/kovurorukevopiti.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/1970270060.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9b0f7de8b4---4042235010.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=honda+accord+euro+2006+manualPDF link annotation
    • 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_off0000df78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF78 17168 bytes
SHA-256: 2b58fa03abd8b4f7c21d0291e94624922bb624f854b0c6c183878d11c8644b27
font_01_sfnt_off00010bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB6 10676 bytes
SHA-256: c30028945d3d01540089b2dc08691e08ffde5b7db5e92c0007977f2836ac1397
font_02_sfnt_off00012424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12424 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1