Malicious PDF — malware analysis report

Static analysis result for SHA-256 c715e6310abe24f2…

MALICIOUS

PDF

69.0 KB Created: 2021-09-25 03:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4b665453da620632ec911c1dae73d170 SHA-1: ccbd50fa370ef6e19ae838ad2437845a54524d4c SHA-256: c715e6310abe24f27fe442d7fd9f9a941fbed1ff3da0581ae2ba6b00c4c1d197
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a lure for 'gta 5 download for android free' indicates a phishing or scam attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://irlanc.ru/uplcv?utm_term=gta+5+download+for+android+free+full+version+no+verification PDF link annotation
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/ac912775bd04e95fce8449c6776e3f92/39681776179.pdfIn PDF document text
    • http://arucax.am/user_images/file/42406520172.pdfIn PDF document text
    • http://musicincw.com/fckeditor/userfiles/image/18333720015.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/26233359866.pdfIn PDF document text
    • http://nhasachthunam.com/upload/files/tadifulogujevaxudagex.pdfIn PDF document text
    • http://zussobrance.sk/grafika/dokumenty/43522072794.pdfIn PDF document text
    • http://www.mab-solutions.fr/upload/file/lawofeven.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b70f887fbd---tejijajusipulamoze.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/4501862666.pdfIn PDF document text
    • https://www.sacict.or.th/ckfinder/userfiles/files/fubamolizesotiv.pdfIn PDF document text
    • http://harnettcountyhba.com/userfiles/file/rotomumuronoporuxu.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/vefupobinolol.pdfIn PDF document text
    • http://www.superior-inkjet.com/login/ckfinder/userfiles/files/81284002103.pdfIn PDF document text
    • http://irinabailey.com/upload/files/40258131334.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/20527615293.pdfIn PDF document text
    • http://sinorarechem.com/upload/files/61247471687.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/l742gfu38nr0iva8bak2akem80/zowokisizi.pdfIn PDF document text
    • https://mccartha-cobb.com/userfiles/files/xewidapopawoxugomozas.pdfIn PDF document text
    • http://zagazzo.com/userfiles/file/3702519239.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/10427819275.pdfIn PDF document text
    • http://musicfriend.vn/public/default/ckeditor/files/libetiz.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/99268769983.pdfIn PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/rewaf.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/28520363056.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_off0000aeb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB5 10892 bytes
SHA-256: 8ecd3c2958730410cd8594fdeeb3ab1ae23fc1a05f067cb6034e0ec83ad0208f
font_01_sfnt_off0000c833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC833 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE045 15028 bytes
SHA-256: e481e9edb632bc3e49a765046a4c88c511605f6ee5a452f766d20c565de1c374