Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3369a0840f1910…

MALICIOUS

PDF

98.5 KB Created: 2021-09-01 06:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 06b4f0cde1526b39f0bd4f2fa7b222b7 SHA-1: f197431a185bee6f95a4b96593d0ef1d213ae4be SHA-256: 7f3369a0840f191059a0f5b486b58180f638bbded96346009dc2ca27e13c936d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are indicative of a spearphishing attachment, likely aiming to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://garglob.ru/uplcv?utm_term=nike+brand+identity+guidelines PDF link annotation
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tolatuxef.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/69224097474.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/56681581687.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/129e56bfc4e3c48f48c846439fca1464/punokebegozanuwazemusomu.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/fplll6mtuuc401t46sg919teoe/disuvokekutakowesasexowef.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/b0e15987a4711335c31432b1ea774875/39157461899.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/besafuvafemaxokadekoxi.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608c714e7b9dd---47208837507.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/muzowukiloxupiga.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/30118391213.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/sisamiwufep.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/55870244912.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/c8cb1255affad5e78cf9b2c97dce3577/16700991446.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/19179951890.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/20904465847.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/1cd10a8aee6ad16e6fc0a4c348b39831/gaduz.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16077892a0677e---82342948768.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/11258283791.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff7e196ace---bamuramiwozofodimezukegof.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/19362405885.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7553ebddb---23952524910.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/83302570315.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/lazemIn 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_off000119fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FD 10724 bytes
SHA-256: b315de842688d675b1e362116cedcff4ec086166db469d42e01d2cdafe3c82e2
font_01_sfnt_off0001328b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328B 18804 bytes
SHA-256: c02234bd41795494a60184db55464486f758e1fb5322d9cc2a6ac8fb0b6ac205
font_02_sfnt_off000162e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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