Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d433b3f8282c28…

MALICIOUS

PDF

100.2 KB Created: 2021-09-06 12:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3e52ea75c7df9a1ba1868577a63a7cba SHA-1: 8f0e030786696355f9ca94f860e53cab1d953e3e SHA-256: 06d433b3f8282c280bb2e9006dba844a3ea82c606377e26ffaf7c9e192e647a6
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised CMS upload storage or disposable hosting, indicating a likely attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, classifying it as Pdf.Phishing.Trojan. The presence of external URIs and link farms points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://milkexim.ru/imgeditor/file/zomolelobozavavuxamifa.pdf In PDF document text
    • http://alexlunacoach.com/img/editor/file/xakezivekiburepeme.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a5814b7e9---1416731123.pdfIn PDF document text
    • https://e-ceramika.pl/userfiles/file/53784565074.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/46969141792.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d60a11d2240---fubewokokegujekukaf.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986019f0675---48708294012.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/fujepelinesitokokosit.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f342dba07---rozit.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fa649ee2d---59892168289.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/werupavunagezowodoxusal.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/jexijijaforoxerijenotuj.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/18425189445.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/92058396203.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f550df07b2---guwazukisagetujobazut.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/64329935398.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/munurirajop.pdfIn PDF document text
    • http://adec-interiors.net/Uploads/file/tuzukavenid.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/5897528365.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610277d84533f---24819802021.pdfIn PDF document text
    • http://nprofit.hk/userfiles/21240127924.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=convertisseur+pdf+word+gratuit+francais+en+lignePDF 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_off00011d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D66 20212 bytes
SHA-256: 726c3fbc207fa136618f058bd882acf92567e5cddf6900104ee111465387ce91
font_01_sfnt_off000150b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150B6 11080 bytes
SHA-256: 405880076f5640d4d026665f0e7e24dc231de9aa0a575b1147e854e1ebb7ce99
font_02_sfnt_off00016a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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