Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be5c37a001423bc…

MALICIOUS

PDF

82.5 KB Created: 2021-07-15 14:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 55bf03f5aa8cedfb3a3f59c52a8cd096 SHA-1: f0190e1f33ecdcb728a9523798785bc7d7b91102 SHA-256: 2be5c37a001423bc46194e8c5ad0e75f428ad77cd0ec09a298f396d14575021f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs are designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb1f3cc920---51947036777.pdf In PDF document text
    • http://myxroad.com/upload/userfiles/file///jalobiparatuwelilunuva.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/mjd7fuphf8jc9ut1ggc4ri5sgk/pagerisew.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/kamazageluxutoguvuwipin.pdfIn PDF document text
    • https://finatwork.com/userfiles/file/lopixujirajem.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/taxujowib.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/70608174818.pdfIn PDF document text
    • https://defrokatilai.lt/images/files/ridejiwinu.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c78d921ddf---farobifununenixide.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608869aeca60f---vadiwutefemipelinenisopud.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9ae82205c---7933018407.pdfIn PDF document text
    • http://chapmanhighschoolclassof1968.com/clients/c/cb/cb1fed5110c07f199f416a264ee6943c/File/93605145658.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/60694239714.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/e5712579c41c2ea7ddc411430efc519d/rifoxukudazasebikabumekur.pdfIn PDF document text
    • http://qca.ch/userfiles/file/71758455370.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c5da68f51---69656880552.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/78c140e12595598fad81f66df3c05e40/2503182897.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/89254239627.pdfIn PDF document text
    • http://edu-tur.ru/userfiles/file/venafokilibuturawikafefux.pdfIn PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210708191823.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/44410751895.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160763f167e7c3---nafote.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=an+example+of+a+neutralisation+reactionPDF 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_off0000dd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF539 17672 bytes
SHA-256: cd2bfdfe9cc60a849ce380a964644e1e228e4b7052fede7a30d78d525785a0e8
font_02_sfnt_off00012384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12384 10824 bytes
SHA-256: cd2ea7a1d01b3df94566ee8e194e3407291f4b29372c2d7b9eff445ce6caf495

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