Malicious PDF — malware analysis report

Static analysis result for SHA-256 9afb9356b5c6cae0…

MALICIOUS

PDF

85.9 KB Created: 2021-07-07 01:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fb65d75a38d379ce231a9e7c97081ec0 SHA-1: d625a94c05a21b9de760d969cfb103358abbdba9 SHA-256: 9afb9356b5c6cae055d7db23dd3b398192211690f7e88c0495e6c00f3544dffc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the nature of the embedded links suggests a malicious document intended to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=30+60+90+triangle+word+problems PDF link annotation
    • https://zold-kommando.hu/files/89246814972.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa8b7d7ea2---40697823949.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/25825209844.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/13649624262.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/31476184916.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/legemumojozo.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/u818ckbjcnb9vhgkj14ak6o0t6/80499056616.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/birabu.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebcc96c9e9---81931070148.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/losevujujinulom.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/jabetewamikewape.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711c416d75b---sefasosovo.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5b92d0465---21776172229.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/nebokanibexolapozusasabu.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/japomeriripemilabegipogu.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/a57b9378209691b184610b320edd6cce/17319483129.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c20b3caf862---tuwasonen.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/43134265459.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/7786092856.pdfIn PDF document text
    • http://www.flamanville-76.fr/upload/file/60487106590.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/d58b4f514689687de3f7c811a51971aa/dotewazipe.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b23abaab75---simojuzopavuvikizugajasu.pdfIn PDF document text
    • https://club-sports.net/uploads/products/files/80581469939.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

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_off0000e453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE453 18628 bytes
SHA-256: cbd0d7e0420657c05b778234e30b062d0452a5a0f06221aef16a249fcb7730d4
font_01_sfnt_off00011602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11602 11492 bytes
SHA-256: 309a0726dd9126007c60d9705660325b12dbf759de671ad941076f2f6f906306
font_02_sfnt_off000130a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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