Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14fc9642b2e9a32…

MALICIOUS

PDF

107.6 KB Created: 2021-07-13 21:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6e4f78c4b61d39f31455d47435ea78c0 SHA-1: 47293e96fb520e300d56a885f4c88a1f5c77c53d SHA-256: d14fc9642b2e9a32f48072e6fa81970adf23372bd06e4f34b16a50ffe44df6dc
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute further malicious content. The presence of external URIs and a link farm on disposable hosting reinforces the phishing and distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/51c113fe229e3ee0f07db70d091b39d1/jewixonafo.pdf In PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d5b2fa3b23b---13640726679.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/ufubabogef.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/98498686456.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce028f0c320---buwatupaxozipibutejit.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd89ec03c9---62324234570.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160946c20d75c1---woxowowize.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160853fed6818b---6962239136.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160afb6fb2a89b---81894297498.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/66163422107.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/jakogufofimuvuxapenalivut.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/g16fjaopdrk1398q3p87skh95c/gonanixexolizopaxoki.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/65420bb2853cb79468f88c2b82e999df/fonadufoguso.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/dae392db43317c114cbafd8d4e9a767a/47910470701.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b9baadadd96---47430349736.pdfPDF link annotation
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/krf0klqt3umfir0glffp0lh6ms/jifemuwunezowutepakisixat.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/95372767688.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/kigelo.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/kumifusalonorijunipizasa.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16252212760587.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837fdef393d---38170161409.pdfIn PDF document text
    • http://www.puhito.hu/uploads/zewefowanarojanukokaluduj.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/tajitobalusomozazogex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=possum+out+in+daytimePDF 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_off00014338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14338 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B4F 10480 bytes
SHA-256: 0d9245fa88a06872e68d9e35b8ae38811fad8164375662de15aa382cde7d1146
font_02_sfnt_off0001732f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1732F 17672 bytes
SHA-256: a4755c1c8681aa35c9a13778d70deb12ab6052b67dd1ae9e70e0b3125caec419