Malicious PDF — malware analysis report

Static analysis result for SHA-256 968284d2a2284881…

MALICIOUS

PDF

82.8 KB Created: 2021-09-23 05:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b43358264bffa664dc4d7c03a270f52c SHA-1: 169198b6c71e9aac80ebc644b5fbf1df723fa80a SHA-256: 968284d2a2284881ad4f6b65c5635d5a280efd021048e59f9f281981a13cd354
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lure users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://wastran.ru/uplcv?utm_term=find+my+phone+redmi+note+4 PDF link annotation
    • http://le383.com/uploads/files/54727802841.pdfIn PDF document text
    • https://carcable-bg.com/uploads/pictures/files/mutabowaki.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614291cd2c802---muvubokedofedo.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/zomapakupoviselari.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee274da3cd---59542022794.pdfPDF link annotation
    • http://rancholasmonturaspremios.com/campannas/file/76908861564.pdfIn PDF document text
    • http://www.sas.edu.mn/ckfinder/userfiles/files/tumon.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/ec2c330a68cae366a71ec7cc73117a3c/68281031296.pdfIn PDF document text
    • https://subarini.ro/mm/file/92157829934.pdfIn PDF document text
    • http://ducthanhtam.com/uploads/userfiles/file/69226830913.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/dokevasirixetedosu.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/fajogakezarotojaw.pdfIn PDF document text
    • http://aromacosmetics.bg/assets/userfiles/file/97002344907.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/9601205130.pdfIn PDF document text
    • http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/borugalupegadixusagisubax.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/31445f21e8a355a489077a63f3e8bce9/wefemapemeru.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bcdf0f3149---35831665372.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/80800538013.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/925d3149733c2e2b4560405d8b1f1c25/jexevebujapis.pdfIn PDF document text
    • http://sm300159.agchost.com/userfiles/files/46929348770.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/zupopinopes.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/90962877302.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/56565352379.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/19051b5e4829898d3499291dfd302277/zevezifaz.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_off0000ddab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C2 10448 bytes
SHA-256: f26fe3e6215095b6256f4b2a68454f57bad531a1801c87145a8b34b9240b0f91
font_02_sfnt_off00010d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D36 18724 bytes
SHA-256: 2a0c3b3d28500f703b369210f8a4a1c49a7074e3c87a7e8bbe5dd74d70cd3f79

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