Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c17ab6b6665c70…

MALICIOUS

PDF

89.7 KB Created: 2021-06-28 19:37:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a46741501ce84d209a71d144601206bb SHA-1: 78317458a35a293d17ce4f68c0c5c4d4b8b6e053 SHA-256: e9c17ab6b6665c7063e8cafc4febe933fad0fc0c4be6fb793b5b6a4ef6787597
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm to redirect users to potentially malicious content. The presence of these links and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/70cbtmv2aqqr1m8aoeo02jonv4/suvirukekikukanupesil.pdf In PDF document text
    • http://alimentosldm.com/userfiles/file/nelepobeninewugixekeset.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/31101787766.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/fcef37b09f993e4a08cf1573aa9559f6/tixunuwojibabaximevuw.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/01a534559ebd77175e3f5becd0232edc/53389017160.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/lunesoba.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/79753328417.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/rqf1vv3m9ot6srle3ls2s94004/fadufopimefilagid.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/0b757228a7e7f3b19d54519b91333803/kezimuxikamogipu.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/98054296425.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732ef6a70e4---89539294288.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/bijixawudo.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia//files/95682906710.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607632a414be9---63158676140.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/18b9df6526fac848d42fc78a4837ebd0/fabewunogebupud.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/mobexozatel.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/lof1e3stt1s5lpc202uptodub1/gafafexorijofimaf.pdfIn PDF document text
    • http://atek-ent.com/upload/file/18830236194.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-6-26/20210626204800142597.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7f4e11b35---tenalebepakotapaleka.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/85862485963.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609d119599911---98692000655.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c411d9a73e1---77039438257.pdfIn PDF document text
    • https://bushregenerators.biz/userfiles/files/jilalokugabanipe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=signs+of+epilepsyPDF 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_off0000fcea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEA 17580 bytes
SHA-256: 1854ba6ea2cf56368ac20283ee34f8034fa0ba99bafcaf45e273f7f62a624bd9
font_01_sfnt_off00012b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14357 10360 bytes
SHA-256: 5c8272c70fb357e7506d6722570f8e7260813a93facd4ed7367822c657bac49d

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