Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a606ec2a061979e…

MALICIOUS

PDF

85.0 KB Created: 2021-07-29 10:27:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cb7fd724edd525e53601278c52c853e6 SHA-1: 3a36c5c02cfe2b0c14fb0dc6b92f981a18b3105f SHA-256: 7a606ec2a061979eb6075e9703378078140177a71dec12f88b91f18615c35ba5
164 Risk Score

Malware Insights

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

This PDF sample was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a visual download button further supports a phishing or scam-like lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=download+gta+5+iso+file+for+android+emulator+ppsspp PDF link annotation
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/4be13c3a92b0f1996db436c29425e924/gazuxorolidotal.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd772aa7001---toluwoluvituzutoxakewefe.pdfIn PDF document text
    • https://dadrarad.ro/userfiles/file/sijuwefelogatuka.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/30528740611.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/12034222952.pdfIn PDF document text
    • https://red-adlay.com/upload/files/45009107899.pdfIn PDF document text
    • https://ikima.fr/uploads/file/92808739580.pdfIn PDF document text
    • https://szallas-karpatalja.net/upload/jodusanigojuxo.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/eaj7omristtqig6oh0gm2fjcmi/jaregajawuwekopefijifera.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210524201935152.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e9d66b046---piguluxoxudunoludukusimi.pdfIn PDF document text
    • http://goldway.jp/upload/board/file/vosupane.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/ggct4do2tidhr41vh9ufntf44b/45685328813.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d543502ec---wakafulut.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082b805975d1---duladuzamasaxumovetosu.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d0b3b20d3---lotofakajaruza.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/91565989053.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/jazug.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16085e4a29645d---ludukibitix.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/0m5df3cv3mavkd9csgnrsbk9tp/japafajaduzepemerewagal.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/q1sttr8crot91ussu2qed3vc2e/rajogedabume.pdfIn PDF document text
    • http://www.klimavill.com//data/editorfile/77483184749.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/bc2533e34a7e1945420e097eef6cd1a6/wefuzodovuvixezepine.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_off0000e650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE650 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE62 16836 bytes
SHA-256: 2b98e030f2817270fd109e0b9bd86451e9ecfd838b32c4ae461f7ade180dd6f2
font_02_sfnt_off00012a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5B 11164 bytes
SHA-256: cea4ad95b2af91c7fe0a487a03b7e4459c246c3044fb8c4a4b8c43547c68f148