Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a0cae78f9f1c6b…

MALICIOUS

PDF

84.5 KB Created: 2021-09-07 07:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 49d8c45555ea2c0f6f907a2a15acbc88 SHA-1: 6564c0bcd7f40f0469649b3c942306a11a082308 SHA-256: 45a0cae78f9f1c6b12a7c2da0040983b6079cd61188d661360ea63772ff7897b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating it is a phishing or trojan PDF. It contains numerous external URIs and links to compromised WordPress sites, suggesting it is designed to redirect users to malicious websites. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing attack pattern, likely attempting to trick users into providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://coretry.ru/uplcv?utm_term=debit+card+application+form+sbi+pdf PDF link annotation
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/71ac268e4009261fa68ebb34f0d53967/5152594079.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/lajitutofelujubolizanozut.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/20514661036.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/67344942972.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/kofunazelemusadetifugos.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/idb6nn6tthlee0sc1il6tf9qb0/vuzenulololujef.pdfIn PDF document text
    • https://justbuymeds.net/userfiles/file/fupugutox.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/35466494135.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/89923728890.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fe516c074---dakovi.pdfIn PDF document text
    • http://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/29547051370.pdfIn PDF document text
    • http://kodemari.info/data/files/14438118012.pdfIn PDF document text
    • http://firegallery.ru/img/upload/miruruxekuwufetixe.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160edde8192ee7---bijozijapugana.pdfIn PDF document text
    • http://infoegrafica.com/userfiles/files/35957403604.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/wesusetes.pdfIn PDF document text
    • http://innobiztour.com/FileData/ckfinder/files/20210801_72C3890D3EC5023A.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/rijebodopuxudem.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613354c75d516---14411007887.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c03a31f76---vazaj.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0f2b566fd---bafeku.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a54c487f59c---75409709196.pdfIn PDF document text
    • http://ippon.lv/uploads/File/94663295640.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/12284983370.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff44245468---vamasazavupibinonizemufo.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/abffab297238b4257a51083c12383f59/wizugoxagedawafufoxorura.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_off0000e5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DB 10924 bytes
SHA-256: ccb69f4e9825f1867d2bc30c94bb5435560de6db0e71294b99f07e025e70e88b
font_01_sfnt_off0000fee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE8 17672 bytes
SHA-256: c97d747b826d88fc97ff0424a90df0849caca5771aa432eb67c5acbaee38e6c7
font_02_sfnt_off00012c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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