Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d2fb6a1c06ccea…

MALICIOUS

PDF

84.3 KB Created: 2021-07-16 09:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f76d9586aec9222e35c6571e141e45f5 SHA-1: 1c7b41a4488ae170978e1e2cbed89b9df8ff7b6f SHA-256: 03d2fb6a1c06ccea90b9b05d087bb0b0ab67a4878c8efb1eb5dfa9af6613a000
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting services. These links are likely intended to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://mooneyes.pl/userfiles/file/lusogabujaxaf.pdf In PDF document text
    • http://omni-links.com/images/blog//file/rajujos.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/13423469635.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/680ace25cdf0ede91498136bed9cb5f3/tekixisofijopaninitokavo.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/517cafa4a9b6ef14a472a53bfe157e6c/sigupiropifurenaneni.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/e14364ca883943bf634f7c1f7c9276c0/kufuzigefe.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f7c544202---bidezegi.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072dea6ede58---12793410154.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/fv8g04aopa7tcsknbsmnj7fb4e/43915799144.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/6130708527.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/88400791057.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dccc1be196---soxaj.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/8985845955.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/latozef.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/govuledozimomug.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072c20b6a7ab---78528042408.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/33300387707.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/ec6817e53dbc64cad8e4a480f9143462/winevuvodona.pdfIn PDF document text
    • https://unserbiokorb.ch/userfiles/file/zunovitekegijijenarus.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/knqb0jt7q42tnntqn4mk37m092/70494142572.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/bb4c0b8620cc17b7c3435b646474c518/28369096260.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/80e8712e48afe4d448b233c5c693d799/jitamemofupapek.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210510/210510141418433303hen0sztkpibj.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/40649778294.pdfIn PDF document text
    • http://apcmagon.com/userfiles/67670332613.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1cde0aed0---vejozexivavakurit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=teacher+using+technology+in+the+classroomPDF 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_off0000e816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE816 10856 bytes
SHA-256: a1378ff1ab8e0fb5f425476f0457347956d1a8070078681c794238bcae651985
font_01_sfnt_off0001010c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001191e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191E 16336 bytes
SHA-256: 9709ed104e11c15dc7ce484f517a0ace683077e186f804a0dc40ae2e2cea826e