Malicious PDF — malware analysis report

Static analysis result for SHA-256 78fee24af7926589…

MALICIOUS

PDF

76.1 KB Created: 2021-09-19 10:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5a296263005aa1bf8a85a510e7542c1c SHA-1: 756e4fa6e9b4cd7e09d311edfdb4ebffba39f13e SHA-256: 78fee24af79265894022d782bda1b7b468d2185d034b529ecc32a7655285962d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress upload storage or are hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://queure.ru/uplcv?utm_term=cricket+live+tv+app+for+android+mobile PDF link annotation
    • http://safeabortionnepal.com/userfiles/file/35644975592.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/vufatipuxomek.pdfIn PDF document text
    • https://gregoryshow.ru/files/file/razazag.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/5141916612.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/1674449437613c66e8e8187.pdfIn PDF document text
    • https://thanaclusterwestgate.leaddeehub.com/userfiles/files/wawirisaboxugapos.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b200af4016---92390365920.pdfIn PDF document text
    • https://dauglita.lt/components/com_mijoshop/opencart/image/data/files/wugaxewofamulal.pdfIn PDF document text
    • http://artbaget.net/admin/ckfinder/userfiles/files/jonafi.pdfIn PDF document text
    • http://aven.su/userfiles/file/gadogatikezaz.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/xuzajometobekizuzifo.pdfIn PDF document text
    • http://esangsok.com/upfile/files/tiwimaruja.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/rujemuzefezedibuj.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/zajopejezedoteterovutat.pdfIn PDF document text
    • https://warungmimpishio.com/contents/files/sugigasexivanerisinodexiz.pdfIn PDF document text
    • https://andhimazhai.com/images/files/86098412509.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/22776333135.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/fc96ea695a2f88e47385d33c3d628ed1/66595995465.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e53715554---dowununiregupovolibexe.pdfIn PDF document text
    • http://e-hematologica.pl/users/file/namuzeduperamubimak.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/fiwizofowilozeduxu.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/2ajjelmqavl33hqnsb97ldlnc7/jenodajixagamaje.pdfIn PDF document text
    • http://viajaconsciente.com/imagenes/userfiles/file/44455471075.pdfIn PDF document text
    • http://musicincw.com/fckeditor/userfiles/image/pinunupew.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f2b740b727---defojorotuxaxemuzuvezil.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402176e9570---9868650304.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_off0000c797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC797 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dfa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA9 16308 bytes
SHA-256: a2f2191eec84ad80828d611f989d7637448de3c967ac3ee5730521ba7e612f14
font_02_sfnt_off0001098b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098B 10940 bytes
SHA-256: 868cf25fbfdd6edae152df4870b944c855e499c457e606a3468119f47b517810

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