Malicious PDF — malware analysis report

Static analysis result for SHA-256 9699654d7fdf181b…

MALICIOUS

PDF

90.3 KB Created: 2021-07-15 22:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2be98416b8b7569841cf355db6fb687a SHA-1: 4a76d44982f52854ec503629de13126bdbe7ecb4 SHA-256: 9699654d7fdf181b727d901248939f18ffb6099fed16b5c733e1e6f2fb732027
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics identified it as a link farm, with multiple URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were extracted, the structure and embedded URLs strongly suggest the document is designed to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/mn1j3bm4ursou67f7q1i7t4or6/61426028172.pdf In PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609413de06bbc---titibidonerurulifumekozuj.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607046ad09980---gilotejasesazedezux.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607090960ad76---wafuzolexujon.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/9013c570af5e4dd9e83bc6062dd6c328/woxajefibozurunidogu.pdfIn PDF document text
    • http://eraucheta.ru/uploads/file/makuxewevaku.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2856135546---bitomuta.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/oluvaworalob.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/3a4c484fb1ecc2e924adf35040efb93a/61479566119.pdfIn PDF document text
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/vomelojadinifuketatosaza.pdfIn PDF document text
    • http://cmtsport.com/pliki/62797927643.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/4884ce3fd75d07fba353ff5b1ddc4884/6060215787.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/nomopuvowuxorumuxovurufe.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/vuxapu.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/gitefibek.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/2dbcb3beaa19368f1f6884dd06e598e1/50866547914.pdfIn PDF document text
    • https://oxfordjsr.com/userfiles/file/tovilazep.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/13221384700.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be399a9913---10513738575.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/mamivolixakolizatun.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/2818394211.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9a28be5d3---99288071502.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0d7f27090---muzavuvikimezexemukad.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/vuvuwogifaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=planting+camellias+in+the+groundPDF 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_off0000fbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC4 18416 bytes
SHA-256: 6d050ad3ad12c73522c6b15779bb07710f1c357a47f598944a1fe7f75c8c19a6
font_01_sfnt_off00012ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000142ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142FF 10920 bytes
SHA-256: ff5708e27324c708d08e94b33a05831271c4b3b9d3ce4c14fe7bd485f107d05f

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