Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e20701189ccb97f…

MALICIOUS

PDF

84.8 KB Created: 2021-09-02 21:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: deac8416f177a17fe72c40b6fab190ce SHA-1: 548da7008f401ba9d21a0b686d88f8275dc6bfee SHA-256: 6e20701189ccb97fc33e38e3e300a1b8ecdd15f33dbad8ae7cdf99b6f7f22dfc
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating it's likely a phishing or trojan delivery mechanism. The PDF contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm or SEO spamming operation. The presence of these links and the overall structure strongly suggest an attempt to redirect users to malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pet-fashion.ro/mm/file/bumeganusekiwiv.pdf In PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/90013193298.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/18888392142.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/fevobuludixitulan.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/67970308058.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/58af3e596253c492d137d501adf6924a/kudafokajokovojiresipala.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/kemosijizinew.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085924e75b97---napinabolazesunavavilu.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c373cfa0235---modajuzijifuwiredifekuk.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/xemovosatadudobujikodox.pdfIn PDF document text
    • http://edwardlankin.com/clients/86087/File/kakun.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d51f6529905---pizobolobuze.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b30b80ba1fd---fimorudijurisad.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/14394662675.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/9b29354f6c301a7c7ce1c4649b25ded8/44640250607.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08fb25d731---zonoveluj.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/43591012677.pdfIn PDF document text
    • http://e-district.org/userfiles/file/rivetizivu.pdfIn PDF document text
    • http://griswoldremgmt.com/uploads/files/kejoduzikojugoruzakexi.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/20493943420.pdfIn PDF document text
    • http://cachnhietcacham.vn/Images_upload/files/92908992223.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609f661125502---didizulo.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/tixomalosojinanopo.pdfIn PDF document text
    • http://vakoplus.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/77239943551.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=2010+dodge+grand+caravan+sxt+manualPDF 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_off0000e4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCA 17936 bytes
SHA-256: 6eb2827742a0372276b127a4a9f70c0a793d4eb29061d0e3338bbb300ef45d87
font_02_sfnt_off00012b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3B 11088 bytes
SHA-256: ef7abb3c4fc7a57f815bb17681112fc8b52869271c2e098353202bdd7172642e