Malicious PDF — malware analysis report

Static analysis result for SHA-256 076568e6c76b3bdf…

MALICIOUS

PDF

77.9 KB Created: 2021-09-06 16:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 45f2672ac7b81303fc3c15f0ac3543f6 SHA-1: 937fedeb11de10348a6e67af0d387668e0fb00a1 SHA-256: 076568e6c76b3bdf855320d639fa632bd28ccdab2707de7e6aaed366c4b81b74
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://chcial.ru/uplcv?utm_term=jurnal+morfologi+fasciola+hepatica+pdf PDF link annotation
    • http://files.ibiza-ferien.de/file/70384060325.pdfIn PDF document text
    • http://schnauzermountainminiatures.com/clients/17729/File/60994583203.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fc42cd8f5d6---79761136067.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/c6d75d540d0acb61c9cf63f8b0e8b92a/xurotomidi.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/10766105846.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/likip.pdfIn PDF document text
    • http://airmon.hu/images/files/50820078644.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/79797593865.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/misalogisagekufu.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/set3a36kdusrdert7f55f4qsni/lafexopasote.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/3292496f6635a9a9e4d920bc82bc7bf1/matugagekegir.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/q2uqnnkfruamgtkmuab2pu819a/jememavawamovub.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/7d0c632fa29b60087a4e8302bd6e73b1/mavevodabolumizogadobex.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/4082446290.pdfIn PDF document text
    • http://newfieldclassof1982.com/clients/6/69/69e49ffade321d977af769e13f9f004b/File/83530954925.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/18096173863.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/35489790731.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e1b5f842d6---67957968194.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac119229209---90550522753.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611a3802a81c4---15553740823.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/9717514918e12399d058df4dcdde9a21/45969824444.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071e8b181d60---tadubizerawep.pdfIn PDF document text
    • https://dii.org/10.36452/jkIn 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_off0000c7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DD 11160 bytes
SHA-256: db79b4b6d481c8b651823e294177575719cbf7a617ac4b898db8857f6a515c59
font_01_sfnt_off0000e188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE188 18620 bytes
SHA-256: 867f153c1b304b2a6a067834a4ea8e41003439386ae3bb74efb0b0a25c388875
font_02_sfnt_off000111e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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