Malicious PDF — malware analysis report

Static analysis result for SHA-256 5460fcd01c6d6fbb…

MALICIOUS

PDF

86.3 KB Created: 2021-09-20 11:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 5fcdec8a38a904b69863d04995b4f3cf SHA-1: a887d5f5ce03545763a4abeedcf0f485cdf4dc7f SHA-256: 5460fcd01c6d6fbbed0f1208302bf81b725ef780e33125ceaffcebfea7ecc553
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to various domains, many of which are identified as link farms on disposable hosting or compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further payloads. Although no scripts were explicitly extracted, the PDF structure and URL heuristics suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://pixomot.ru/uplcv?utm_term=offline+coding+apps+for+android PDF link annotation
    • http://hiro-seiko.com/upload/files/64009345232.pdfIn PDF document text
    • https://mimpishio.com/contents/files/gegilolibilojom.pdfIn PDF document text
    • http://vattuxaydunghl.com/userfiles/file/nitulojum.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/satawugivoxovadamidatimum.pdfIn PDF document text
    • http://baschin-heizung.de/meineBilderAlbertGrundschule/file/72491906012.pdfIn PDF document text
    • http://fitviewer.com/files/file/bajatusir.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/ragaxatipifimixovefezot.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/161462797f09f5---gedarilozomivipamebibadep.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/31960451201.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec6c57e476---wisosamuwotukoxobe.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/20751408219.pdfIn PDF document text
    • http://christ-china.com/filespath/files/20210903182033.pdfIn PDF document text
    • http://www.como-grup.ro/fisiere/file/14014343569.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/26661538952.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16142b356eabf7---92550615661.pdfIn PDF document text
    • http://columb-sklep.pl/userfiles/file/jogiwubefafeturevotina.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/bagoruvikizu.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/pilugeworudewepofebana.pdfIn PDF document text
    • https://gulamanis.com/contents/files/70549520675.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/75509361563.pdfIn PDF document text
    • http://www.psyforyou.nl/upload/fckeditor/file/zariwakedovovumedovij.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/femunu.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/dovaka.pdfIn PDF document text
    • http://massiimo.com/piceditor/file/33456646714.pdfIn PDF document text
    • https://rt9.rspo.org/ckfinder/userfiles/files/35103729893.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_off0000ee14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE14 10724 bytes
SHA-256: a77102d9d353ded80e66465c0cbadc9fa9fb1257101e5eb7f82e4c96fc63afa2
font_01_sfnt_off0001068d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9F 17376 bytes
SHA-256: 316f97df6f9abec367f151e4c05369cf503c8d7a73da8965882b28ce702f4181

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