Malicious PDF — malware analysis report

Static analysis result for SHA-256 701afdf9a809d49d…

MALICIOUS

PDF

84.8 KB Created: 2021-09-11 23:36:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 58bdc43ff26f715ddf2f902dd2433dc9 SHA-1: ccef604f43682eff6b431714d27735778656a23a SHA-256: 701afdf9a809d49d4092b8709dccc961fe8671b184d72e595d23b7fd043949e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

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://valstybestarnyba.com/upckfinder/files/fimewumimafulojivep.pdf In PDF document text
    • https://bunianco.com/other_files/File/30845611500.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/pofisegetipivazoxutisa.pdfIn PDF document text
    • https://gencshow.com/upload/ckfinder/files/zutevoxasizefagisinopebo.pdfIn PDF document text
    • http://kbcsisa.com/upload/fckeditor/file/30098687606.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/jupiwovinugifawobov.pdfIn PDF document text
    • https://maria-galland.ru/files/file/91084211876.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/delig.pdfIn PDF document text
    • https://yenhuy.vn/upload/files/basidexe.pdfIn PDF document text
    • https://anup.bo/images/files/fuxaxakevunixinesazusaj.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613684d491fb1---23115087697.pdfIn PDF document text
    • http://englishkan.net/UserFiles/File/70370528218.pdfIn PDF document text
    • http://amdind.com/userfiles/file/18532594003.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/romufebulebikulidedofaga.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/f17abe46efd63143060e496fe7c3376a/86967955060.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/mitodizexurazilibomikepor.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/090505271078.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133dd945f6a2---30196678025.pdfIn PDF document text
    • http://csc-020.com/userfiles/file/20210909045211_xj0aph.pdfIn PDF document text
    • http://fsf-vastroad.com/userfiles/file/5465770845.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/watebuxabajojazebosixobaw.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ba47c6e94---xajera.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/tasibajip.pdfIn PDF document text
    • http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/35140278202.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=hack+magic+wheel+mobile+legendPDF 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_off0000e43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43D 18880 bytes
SHA-256: 3e732c8fab6393365f3d49246999d35f58b9413867ee0c2bc552e115070923e4
font_01_sfnt_off0001153b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153B 10760 bytes
SHA-256: 07e74ad465e48ed010521f1a6279074bdde89565132ca4ba5b7a93199b9f7f10
font_02_sfnt_off00012d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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