Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eea14f13c9d2f8d…

MALICIOUS

PDF

85.3 KB Created: 2021-08-07 03:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9025496cb6e1b15d0e9cce7b76526683 SHA-1: d28051493c97f69ee6e8e9aaafeb964f205b0267 SHA-256: 4eea14f13c9d2f8d13576474bac8f5d5fc0540c93c8a06b4ec87b94ac5001e3e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URIs, many of which point to compromised WordPress sites or raw IP addresses, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_URI_IP_LITERAL and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern. No scripts were extracted, but the document's structure and embedded links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://altinhediyeler.com/calisma2/files/uploads/bibepekotefekifo.pdf In PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722ea74759e---birifogikoromub.pdfIn PDF document text
    • http://cartopack.com/Images/file/gilonodesulapes.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/rixapepevuwesiwetebuv.pdfIn PDF document text
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/sokemozafar.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb3391d26e---37443718207.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f091b99eaa---45976287926.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/524083fcf3279405838d00245b0be575/5288745018.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1e543b18b---zebagukurap.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45b96888ed---dapabijenozegotiwu.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/goritutireburo.pdfIn PDF document text
    • http://medica-brno.com/files/44797393178.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/zoputiret.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081efb6b5aec---gumisonipanis.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/bogevimefekabip.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4cc9a1077---rakowipori.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/pamego.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160be6acc9bd00---39417787418.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/nomefuletegedavozi.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/lirenuzazexizamojupogefes.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f0239683c77---faxuvuzuv.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/65130785077.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/51650361990.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1610a5c52acf91---34238618171.pdfPDF link annotation
    • http://btfa.tw/upload/files/50573335786.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a4547800f04---86193415736.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+do+i+get+a+food+handlers+license+in+texasPDF link annotation
    • 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_off0000ebb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CB 16252 bytes
SHA-256: fc3aebd6df3d251edf460bfea02d8aacb1eacafcdd413c5b8e96480628cc538b
font_02_sfnt_off00012df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF9 10932 bytes
SHA-256: d1bf86f5c8d1bd84f3aa5218b5eedf3f1913d9d86e5de4a3c63bf6d79045d946

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