Malicious PDF — malware analysis report

Static analysis result for SHA-256 2095db5566638966…

MALICIOUS

PDF

84.0 KB Created: 2021-09-03 08:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7cf5d25209843690f7992b1e68162e0d SHA-1: b374d1399882c583ae86ea7493b2c2fc454a6401 SHA-256: 2095db55666389660abb5eb0a067d67198c9f36726af1add4b7b8b27e6a83279
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external URIs, several of which point to potentially compromised WordPress sites or disposable hosting, and one directly to an IP address. These links suggest the PDF's primary purpose is to redirect users to malicious external content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://amadesafar.ir/basefile/amadesafarir/files/31140545621.pdf In PDF document text
    • http://aczelzalog.hu/tmp/jekomabawunoger.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078fd8450f0e---57967069876.pdfIn PDF document text
    • http://lafayetteconnections.com/clients/52818/File/foxewovepetaw.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a68390a8c9a---71657193112.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/95500449839.pdfPDF link annotation
    • http://asavn.vn/uploads/userfiles/files/82566317324.pdfIn PDF document text
    • https://biocoils.com/img/file/jusafegixamifiwituwur.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/82c9b4e9235ad7339cc2322211854341/wuroj.pdfIn PDF document text
    • http://brukikostka.pl/uploads/page/file/tojaforijibunosuzedigoji.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/o634ri9eig92v7f7gsfb615fo3/tepapasusifukifew.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/48571711895.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608aaa589fa41---loneroromavelogak.pdfIn PDF document text
    • http://xetaihyundai.net/upload/files/29741114152.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/fef7384eac95498621f7893fc0047f12/81930315069.pdfIn PDF document text
    • http://cgemfoco.com.br/ckfinder/userfiles/files/vixeturazimotadenavuvez.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baae0e53ece---4671581793.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/3606127858.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/62164775078.pdfIn PDF document text
    • http://pickup-ws.com/userfiles/files/63891353806.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/gipanabodaguwoke.pdfIn PDF document text
    • http://1-cx.com/ckfinder/userfiles/files/18815737452.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/c0c5afaec6503e43061785ef39e7884a/27172301326.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/0f0ab19cac9b78b74a80e129ec652085/netigotaratinezikex.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c71f1b97556---nolegupo.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/c7bdfb02b2edb26c129c0ef957c44a36/28143373184.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=basketball+court+rules+pdfPDF 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_off0000e53c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53C 17140 bytes
SHA-256: df4662462cd8ff0cd79c10051477cdc8397de0b48a122ee27e0af681578ca6ae
font_01_sfnt_off00011197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11197 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129AE 10800 bytes
SHA-256: 6cfbd391234ffc2c84c17007f3990dda985fdbfaa135d88655c9ed871a6fcaae

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