Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca882ef954ccb41…

MALICIOUS

PDF

91.5 KB Created: 2021-09-03 17:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 56da80a57af6c08e2499e8b985239807 SHA-1: 7ee26e506a8ee2f3ba34abfb9c47d5856b57881b SHA-256: 7ca882ef954ccb4167379c7e0a0c79968d91e4c8754a414567075944163b03fa
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns are consistent with a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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.
  • 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 http://www.dfdtrading.sk/ckfinder/userfiles/files/58239374825.pdf In PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec3f3fe1925---gumitafosetebogabumaze.pdfIn PDF document text
    • http://web68s.com/upload/files/52579965056.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084071e1c5cb---95005809102.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c25020a7cb9---kolazegisimagaforigixelif.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/rozivazu.pdfIn PDF document text
    • http://renovator.cz/files/file/zipafutu.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/63929544652.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/28222224530.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/dosuvilare.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/rstnmpniorgdscr5638st5ec0j/teturedebelitodurimagu.pdfIn PDF document text
    • http://xn--or3bo5mvlb.com/data/editor/file/45221972662.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/85055579004.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/19546090507.pdfIn PDF document text
    • http://lbtech.kr/upfile/files/lisibutijadibisajijet.pdfIn PDF document text
    • http://schnauzermountainminiatures.com/clients/17729/File/868463569.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/8c5a9e8befd2b8fbfce65f8c6cc7525d/76184920251.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c50ebdd77f4---jutosojitamubosibokazati.pdfIn PDF document text
    • http://technocom.pl/editor/file/navixizanig.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/17602993365.pdfIn PDF document text
    • https://tranthachcaodanang.com/uploads/image/files/gimojiwe.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/40126010037.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/fapobepekimetixajo.pdfIn PDF document text
    • http://theettiaresottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/16639133028.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=arabic+to+english+translation+pdf+filePDF 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_off0000fe73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE73 11020 bytes
SHA-256: 20db6be4ac1eaeb5c6cd3f896e1947477a96b52f29c8cbde673db2d0f57841a2
font_01_sfnt_off0001179b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FAD 18800 bytes
SHA-256: e033bdf57002e5dd414447ea488a5f6143917586c8d5f256c22b7acf15b043c7

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