Malicious PDF — malware analysis report

Static analysis result for SHA-256 42af1a1d90705bdb…

MALICIOUS

PDF

85.1 KB Created: 2021-07-08 06:30:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 204332b096fd69c4c2cff98d7e872f45 SHA-1: 2c8e372acbdc9a5d1718a951fb4362389eb64079 SHA-256: 42af1a1d90705bdbd43120f4675f0f50cd781d2eb8042aed2f738652dd93650e
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to lure users into downloading further malicious content or submitting sensitive information. The document's structure and the nature of the embedded links suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074257d1dc98---82349302719.pdf In PDF document text
    • http://aloeverajuice.cz/files/file/buzezilulogameparetonogo.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/mezakenonopupu.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/1d32554bbd4f732f2fb4318e01f18a3b/2274807183.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/d46ec6f1b85a6432fd4ba7a730c85818/42727342645.pdfIn PDF document text
    • http://houselandia.ru/files/34154478709.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/l7rhpdvkqr4c80ebtljor057p7/73292216496.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608420d99053d---woworobopanimazagiwob.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfb9983549---wiroruva.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16095be0cb9b18---fexuzivafopimojenobofumi.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/18608424112.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16070475b88351---84408835293.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/bafapog.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/9d4d9926f4a60fe809697886967c9296/pelodexebuf.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/74903543379.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16093ad066b13d---55192293557.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd86a4c960---77953564367.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210518230414.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/fvlghrp32m1gehlh3pjt8oq2qr/26856875313.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-6-17/20210617172940914486.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd0e117f26---zufebonesabesorekivitonu.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/74169850023.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=ipcc+study+material+for+may+2020+pdfPDF 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_off0000e5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C3 11084 bytes
SHA-256: 95be9809171e880343410fcfedda6df0a35f9b9bea9e8a0eaff00eb224e56601
font_01_sfnt_off0000ffb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB4 18404 bytes
SHA-256: 122f20e858002287957ffe8ff0abe616a45e2f5a2d725ae72967eda14010e9e6
font_02_sfnt_off00012efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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