Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26098f1d6fc7b4e…

MALICIOUS

PDF

83.2 KB Created: 2021-07-13 02:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7f0bf98ca971be3e347011fae736af7a SHA-1: 1f99a9ed636eee50f120edb4d1c420987d2a2bee SHA-256: c26098f1d6fc7b4efa0986ae1ad5397292ba0313f1f115a21fdf3665772711f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. The embedded URLs likely serve as lures for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://crysiq.ru/uplcv?utm_term=answers+of+english+class+11 PDF link annotation
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/529a008ca9c000eb12415cb16042b10c/fikunavopixivejepe.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/583cb4ed9081d801fabf2dc8f9dcc936/lemebanawewidedabana.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/lemutexes.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/vipinefojis.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7805e930f---bozuwunugotowuzegujusu.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4505911db---14258468679.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/cjpo5tqr332n2o884v74p32255/bidalosusifaxag.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/gawuxosiguxobivezudeb.pdfIn PDF document text
    • http://webursitet.org/Files/file/84389098802.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/jrfv8hjaggo5el52ij38urq33c/danafubaferitopanowos.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/17d2d9eaf33b634864d6819caa676d02/pamugog.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2b926be3a---29338063315.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac05945ab3b---figiluboxaz.pdfIn PDF document text
    • http://raczcsalad.hu/files/losid.pdfIn PDF document text
    • http://marasintl.com/public/ckfinderuploads/files/wexiwovikefi.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d996b08c6---60353760645.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/f31dac75942ab40e9c52bc64e63b3878/29633856720.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/93408639112.pdfIn PDF document text
    • http://juha.be/_files/file/kopajamosurudu.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/ob4f7ecu321onu8v66vh3s5o30/noxepe.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/siwixalelawumewosaf.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/bexumafiwepologujuvok.pdfIn PDF document text
    • http://ibb-online.ru/f/file/8608821735.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CE 16776 bytes
SHA-256: 2ac9f2f5e432e7238713538e477c8e2e89ff460c57479cdcede7d21759cc9ef2
font_01_sfnt_off00010f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5F 10636 bytes
SHA-256: ce63677b6f7a24a9897ad63a96d945c602e8652ea0ca8fb544ffd9809a44b7bd
font_02_sfnt_off000127c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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