Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2c10217ae5b57cb…

MALICIOUS

PDF

78.2 KB Created: 2021-07-02 11:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 24ab55610d89f3d6067bc114f2d3315d SHA-1: 4d6e8209db84bc0611d783b0f229af0977b4e6c2 SHA-256: d2c10217ae5b57cb5b420c5baef777c1c06a1c758a5ea86af349ba765e669876
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. It contains a link farm pointing to numerous disposable domains, many of which appear to be compromised WordPress installations. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queure.ru/uplcv?utm_term=advantages+and+disadvantages+of+break+even+analysis PDF link annotation
    • http://dokumsuzgec.com/userfiles/files/mugapezemobokiwi.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bf018f14747---weburilatamalavubesideru.pdfIn PDF document text
    • http://m4klynchburg.org/clients/3/34/34420611de4c9c7593cf5e5fe12de6df/File/13996961405.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/68998366550.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/8385704091.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ee7da7087---90159133154.pdfIn PDF document text
    • https://harom.ro/files/file/57047297090.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfe187cbb5---39086847419.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731d28c773e---42859372158.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/e8fcfe2b0cd6dd11acf075721106df21/50252971413.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/vomegeruwikafadi.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/699a6ae177ca802ace6b5adbd8fb3a6c/juzidufibinugigepaxam.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f08869df4---nowinozigogisovozes.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/76133266104.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dded86605a456df90892e3d280e6589f/zapasibogakoti.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3fb545606---xabumabakapelaforego.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/07afeaec5c05445835d1457e0270ca92/80477848238.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609c181f7235f---depadubuvun.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/t5mun1ade4te49iekorp0kpfh7/jamedulegofawep.pdfIn PDF document text
    • https://schmitz.cz/res/file/50812098159.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/a11d792af0bd44d945f0228bf2fdd109/zaxefevuf.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/1e9d9155ee630446ca9b67bef3a1e451/83929158967.pdfIn PDF document text
    • https://sinarwaja.com/account/files/82093583190.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/98997060930.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_off0000d17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17F 15828 bytes
SHA-256: a9e8690495be70955fbe75b0a66fb723b3076f4938822975c2e58085ea05648a
font_01_sfnt_off0000f9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F8 10920 bytes
SHA-256: 3ce0ae843a018ea16adcdc3c6818c91715389f6286a0ffc84a836f6f6d35e3aa

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