Malicious PDF — malware analysis report

Static analysis result for SHA-256 0feddb003fc665d7…

MALICIOUS

PDF

85.7 KB Created: 2021-09-05 13:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a587d8ef548c363e1c9ec348f2a4e28e SHA-1: eebdb0c971baeaca0d57ceb2939f9d91cd34516f SHA-256: 0feddb003fc665d71bea29b73dd602c10ec0e50d015b29fa1899b0fa213b62c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://allytemp.ru/uplcv?utm_term=fillable+pdf+form+in+excel PDF link annotation
    • http://rund.cz/UserFiles/File/68395284571.pdfIn PDF document text
    • http://gdgom.com/upload/file/2108281601042421657aitfkmoulfh.pdfIn PDF document text
    • http://missinternationalbeauty.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/xunivenotazuraxatavefi.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607290fa2b2c8---32392415724.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/94479203758.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/947356642.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f0692e1fa---19509508180.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/fumadox.pdfIn PDF document text
    • http://baltyk.recykling-rejs.pl/imgturysta/files/xatuzuvamolowopoxored.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611af7cb581f3---33267377990.pdfIn PDF document text
    • http://kpnamboodiris.com/userfiles/file/17838204287.pdfIn PDF document text
    • http://fedoro.ru/upload/file/zitulavakapup.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775eefe8f16---47099213415.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/0843616fddb9060e8d95e9999cb77477/vototagajumaxekege.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/qdp2eb3i2l7ob06ebejn3l0ltm/fekitoliminofuxofadab.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/036a61d3272cb0f43aa90064cd62d2ce/nowoperinum.pdfIn PDF document text
    • http://smart-ventures.ch/upload/Editor_Images/files/volejerisewipixabowixafe.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/79700481252.pdfIn PDF document text
    • http://angeladaniel.de/uploads/files/wutedimowututisikida.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16116d16bd5773---61265793141.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/2d9b12d84ec26cedb347a50b1b0d1f0e/88262887304.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cc86c7505df---12096971767.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/97764990646.pdfIn PDF document text
    • https://hirurgija.me//files/66112596894.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_off0000eae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FD 10732 bytes
SHA-256: e611527b84594b6c447ccd18b94c253965a2b8801a355446538e0bba7eb27150
font_02_sfnt_off00011b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4F 17832 bytes
SHA-256: bc8e33cb868c3e3dd7ccb6753b1b626bef7c8d9fcf9655bf4a023e8a7fbd1454

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