Malicious PDF — malware analysis report

Static analysis result for SHA-256 934b92c78049a66a…

MALICIOUS

PDF

88.5 KB Created: 2021-09-04 07:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5fd7bce3f64ffa314eb8f1e01f375a65 SHA-1: 3bc42c8797ea4a5670eec156a9a80658fd1f912b SHA-256: 934b92c78049a66a0455c81592e31bd21595f4a387101a11fc1b138d797e614f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other domains. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to redirect users to untrusted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://irlanc.ru/uplcv?utm_term=manual+de+estilos+de+aprendizaje+de+honey+alonso PDF link annotation
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/efdaf43ba022a395f098751a48e60da2/wifesasadofogidod.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/5ba1acttmo9off3s8bo53h2ap1/62218191244.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/8299ce54fc7204d4551257b45c4acf25/xazananedefotirus.pdfIn PDF document text
    • http://ayurvedicclinic.org/userfiles/file/rirodajerofepimewarunivor.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607b50bf2f7ae---45239220076.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/bagavafuvor.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/sejusalamagulokigatitig.pdfIn PDF document text
    • http://healthywithhart.com/res/file/minovupewivuwi.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/tanonebusixorakidu.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c7cf5c9be---40636201507.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c73b7c4cf---gupogulanoribujibisupet.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b446b3e9139---sapejesojup.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc27f69a1c---ledofirakinaxapi.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/wisulukuzefujejatu.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/1d568649cff1ca64b9bb2db58b244250/buluseb.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/d9ce3ccb351834ed08b16367ca7a2cd6/kerupan.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/vabowibelexunapusa.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/panoturi.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaad6292b6c---bojotudowevulunetal.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/jifan.pdfIn PDF document text
    • http://thriftstorewebsites.com/flash/thriftstorewebsites.com/file/52090886528.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/12304154932.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_off0000ec48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC48 10884 bytes
SHA-256: c40bde21dd9381f9a54c95c099025d1262c374555bb19c5cef4f182498e8fedf
font_01_sfnt_off00010562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10562 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D74 20316 bytes
SHA-256: 9b845c2d75e41bbaedb13850333e8ccd0664bd571dc3f279702262b71ccb768c

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