Malicious PDF — malware analysis report

Static analysis result for SHA-256 29449f2d4a0a706d…

MALICIOUS

PDF

70.3 KB Created: 2021-06-19 15:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a775e634c0f417ab3072e14f9b1e5c42 SHA-1: ad21d2c855de14ae2417866b6a0c8fad59b7f0ab SHA-256: 29449f2d4a0a706d9c7ac305194f82cfdc0ed0c43c6906b0906b7069c7a33562
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, identified by heuristics as a link farm on disposable hosting and compromised CMS uploads. ClamAV detected this file as Pdf.Phishing.Trojan, and an ML classifier also flagged it as malicious. The presence of these links suggests the document is intended to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8239

Heuristics 5

  • 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
  • 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 http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6a7f5fbbc26b6807c051d95f9c442515/pepigokilemonezarovala.pdf In PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/srh1unr114ag53f1vtl0ifpvs0/padokafisefesosir.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b27468952a7---ruvixa.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082536e948a0---fixeviwowilijezibaj.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160860e2a02327---74147869430.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/binubinusukukenajo.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/69903565653.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4cd356a0c7---tewuzamageba.pdfIn PDF document text
    • http://chinoboxingclub.com/clients/36032/File/50164191714.pdfIn PDF document text
    • http://abpaluso.com/upload/file/81189585852.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/5705188069.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081429e6f215---88508766517.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/vupimawugavin.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cfbbd13b5---26918156392.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd5522386e---bopolutepow.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb9efe91ec---mirosobasedadawojir.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/djbbohvsarnnjm6k6l9v4bg3o2/nakepagijivomawemejosu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=gta+lll+cheater+apkPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88F 4936 bytes
SHA-256: babba4b5d0654f6988d887e4b872684821765e93df4d8ffde78572bf6b4524c7

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