Malicious PDF — malware analysis report

Static analysis result for SHA-256 3464bc9e673a257b…

MALICIOUS

PDF

99.7 KB Created: 2021-09-01 13:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 130c44675e4dbb368ddcac1d8b5c7471 SHA-1: 44e1fb6e9748b07514af92493cf0c29684524eaf SHA-256: 3464bc9e673a257bc02d8d19d01b76a84fd1c0f7d7e5cccde8797db9cbfdcb67
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is unreadable, but the heuristic firings and URL analysis suggest a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://edenestates.com/ckfinder/userfiles/files/kidepi.pdf In PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/69845639659.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/57259196411fb59127200bc2132da1c3/16512231464.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160721c4b68642---51484781424.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/q0q4vnve8q9eo240r4cudckia6/77170899312.pdfIn PDF document text
    • https://valeaflorilor.ro/img/uploads/file/81228238441.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/2849501739.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/59338485321.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/e0fd7ea5d42593eda27f5cc7c366a513/42379769792.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/19b14nd422hl3vequpc5troesg/vowuguruxowos.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbed839858---36822544731.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/7ac480a4b96f604274081be99ecef176/86275979050.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/48064155552.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/90690099635.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/oc92h0n9s3f4t9mmhrnjd5oknf/rabipefafazane.pdfIn PDF document text
    • http://infosierra.es/images/editor/deloz.pdfIn PDF document text
    • http://mountcalvary76.com/clients/9/90/9062e1c9f2360b2cedac6e2854879500/File/51841506769.pdfIn PDF document text
    • https://eniedu.com/data/file/20210807054653.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e628a423d---lonanutemiso.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/32788822547.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/komomavenekanenomijefep.pdfIn PDF document text
    • http://gsnursing.in/ckeditor/ckfinder/userfiles/files/34945000582.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=download+orbot+for+windows+10+64+bitPDF 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_off00011aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000132ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132BA 20024 bytes
SHA-256: a33732f91809bd2438fb8b3ba612f6d481008ccad461990fdd40a4d187f152a4
font_02_sfnt_off0001675e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1675E 10860 bytes
SHA-256: c9abf70def29b076b6255fc44249787b21f6b4c2d5afd0833d0661f67484fe6d

Open this report in the interactive analyzer, or submit your own file for analysis.