Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ed764bd6854094…

MALICIOUS

PDF

74.4 KB Created: 2021-09-04 14:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b6c3a30368ca662b2a6c5c719cfb9c6b SHA-1: 21c4254da7bb35c289677587a9e1fd50048b3788 SHA-256: 09ed764bd685409430610ac2e9d8ea5e1821b1453576bd73bb699c491b02421c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which appear to be part of a link farm designed to manipulate search engine results. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to prompt the user to make a phone call, consistent with callback phishing or tech-support scams. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to facilitate fraud or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=fiat+500l+mpw+owners+manual+uk PDF link annotation
    • http://designklasse.de/ckfinder/userfiles/files/88629369508.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d54187d47---90973353093.pdfIn PDF document text
    • http://bwc.lt/i/93974873491.pdfIn PDF document text
    • https://securityguardsupply.com/php/uploads/file/19812493273.pdfIn PDF document text
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/65743608856.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/9041455577.pdfIn PDF document text
    • https://krossi.ru/images/content/files/47303031978.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/48577b80c439a537d9a6e9b351302f1b/23581107459.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/jolijasosigokujuxakeloju.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/80131198008.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609091c08f68a---xilixasedom.pdfIn PDF document text
    • https://southernwashpros.com/nbloom/fckuploads/file/43420364846.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/55260b7162a2d3e3cd5cbdc7f2b8d68c/89384107099.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3979e0b0bd---tujeziminizodokuv.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608e08daae744---44745151688.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/e91afada5efe9992ad5091962d426919/kidutewuvigasesaxu.pdfIn PDF document text
    • https://olboihorgaszto.hu/editor_up2/mofaruzojesuwamiwoma.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/895982f7af36ec25b75118a60e6463dd/67851472443.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4c7fef11b---37307249765.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/54087368123.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/73802969366.pdfIn PDF document text
    • https://smgbid.com/ckfinder_userfiles/files/muvimixamum.pdfIn PDF document text
    • http://levakov132.ru/userfiles/file/61848365982.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/66778661727.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_off0000bdc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D5 16788 bytes
SHA-256: 6492da7fd45c0d6d24cf04280e4837393aae92a79c6c72a56b1b4bff6d0cd33d
font_02_sfnt_off000100f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F9 10924 bytes
SHA-256: 7d191e7c57395a4b9ad0f5ef0b2ee82d48b92e986d378d7864d6fe37a9839522

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