Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb1b6a4868f69a5…

MALICIOUS

PDF

91.7 KB Created: 2021-09-01 06:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d555e2d3780066955168dd3757e13ce1 SHA-1: ed7995e055283e2520375f92e58e291268063400 SHA-256: 0bb1b6a4868f69a54a526994deca1b4e92b638d9ad7a3d6cd14b91ca17a6659e
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS upload links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://crewmak.ru/uplcv?utm_term=install+linux+live+usb PDF link annotation
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/34e685789159955acf76428bb666ae62/15731452742.pdfIn PDF document text
    • http://18554080.com/userfiles/file/1388251897.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7036425596---jijuferawurikorasamalu.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160862220a2d29---fuvasimirekedipelebis.pdfIn PDF document text
    • https://mfdesign.hu/files/file/biputurekig.pdfIn PDF document text
    • https://divanich96.ru/admin/ckfinder/userfiles/files/28855387501.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/26484982097.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e64da4a6aa6---86307537492.pdfIn PDF document text
    • https://tresonance.org/uploadfiles/69872162595.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/63440189560.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/8b84urd4uc4limstdbppkunffk/67262807087.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/92484860161.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/600577d7b0f014a3779b52565f0eba42/45563924686.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/xamozutewolurezariba.pdfIn PDF document text
    • https://ltes.tw-goods.com/UserFiles/files/98210393147.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb0c2168b8---papafizewijizuta.pdfIn PDF document text
    • http://mkngsp.ru/upload/files/69683748290.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/61774335643.pdfIn PDF document text
    • http://fxmeat.com/upload/file/fb38e15c6271e9a9cfe7bc2cb52cd8cd.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609727d993cc2---40447146298.pdfIn PDF document text
    • http://uppercanadatwocylinderclub.com/clients/877835/File/kufasezafonelibowusa.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/m42k9r7o36qm26h9v339neepg4/65434733080.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a50d95c7bd9---88697831198.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/bupiketaj.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160823169affba---nunadowefovazu.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/8d9c2b211a73cd8daf8c8e7374763151/kimevisefalelupexigi.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_off000100be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BE 10240 bytes
SHA-256: d2eb0b5286ffaf16ea34272153173674b0adfc04a59113bb86b216f0759276bf
font_01_sfnt_off000117eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EB 17968 bytes
SHA-256: d3b4264713467428ff27e4049ea4b7bd3f2404c1574aa5e7f99e513c80c176f6
font_02_sfnt_off00014777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14777 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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