Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96e4691dc39e570…

MALICIOUS

PDF

116.5 KB Created: 2021-08-06 08:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f951990facdcc83eddc09fd622a24e5a SHA-1: 8870f69b2fd86f7e4e5e1c79fede506fa0be5c82 SHA-256: b96e4691dc39e570928ea804d9c108221178bea9991a63d7829c37adcc3ddf88
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://totaldeliverancecathedralchurch.com/clients/2/22/22dae496a1749ae881e6bee195142b05/File/kinanijatedeve.pdf In PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/qeka2m701mmnmtm2vc0cam1v46/suxubakijopibo.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/16787246631.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160eda162e64cf---46020510157.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/tarerupajajanolumafonam.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/6d022a2a4e6c3fbc1a985f990d24dc73/44558095823.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104ec0b3a95d---9740599000.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/51908070400.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/pd01cj2kjaen646ns24ksr69ta/zifemupiwosefotigekote.pdfIn PDF document text
    • http://mistralizmiryonetim.com/uploads/file/xikufotiduwuvasogetedikip.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/pewadojavad.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160afa81c1fe88---6395472626.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c3f316c59---36270710800.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/kodutavozomipi.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160948208d4d38---xegip.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/36885387443.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc37e2a88c6---52696877441.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/mivesafujupipifip.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/715e275a75cc99da3e6a6d0c87c218c5/45014295130.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/de6a995f858b8c56f45e8bc240ad214b/solibitire.pdfIn PDF document text
    • https://www.geo-decouverte.com/ck/ckfinder/userfiles/files/14323794362.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/xakupupusinegij.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/0e5433d23af13418ce8860476035f086/vuzeguxenivepakekoxusuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=codigo+de+etica+profesional+trabajo+social+chilePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CDF 19520 bytes
SHA-256: 25b9ae5e2ed88feb391f1e6b80e342e3760a2d88964c5f1e90e806695d5c98df
font_01_sfnt_off00018f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F6A 11200 bytes
SHA-256: 4bbab60c406ea05c1576ec55a9a510ee5157b2dbd2d4107994af90a78b3b8e9c
font_02_sfnt_off0001a91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A91B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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