Malicious PDF — malware analysis report

Static analysis result for SHA-256 0add867789c5bb46…

MALICIOUS

PDF

83.9 KB Created: 2021-09-17 03:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2cb744878fce7cd287b02eb3951bdf34 SHA-1: 775dff4063eb141e4a97531caabed729db7c2750 SHA-256: 0add867789c5bb46ea12fa195537f6d219b4fb3e54391ddd5512c52bb7eb02c5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV detecting it as Pdf.Phishing.Trojan and an ML classifier indicating a high probability of maliciousness. The presence of embedded JavaScript and a large number of external URIs, many pointing to compromised CMS uploads, strongly suggests a phishing or malware distribution scheme. The sample likely attempts to lure users to these external sites, which may host further malicious content or phishing forms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • 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 https://ketchas.ru/uplcv?utm_term=telugu+new+songs+2021
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/7ee49ea2e1438f8d6f91866d365f1995/gosafovorib.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143c9c4bf3d9---53026073119.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc68d638de---waxamadoloximezojisugow.pdf
    • http://zoo-foto.cz/userfiles/file/piwinukalamonanimi.pdf
    • http://computerdoki.hu/user/file/54393579030.pdf
    • http://montex.pro/uploads/userfiles/file/10460498601.pdf
    • http://mannaz.pl/userfiles1/file/zogowuvazafubefezemenemi.pdf
    • http://robedecreateur.com/img/files/pakanelaxatejojegigu.pdf
    • http://thechelseaff.com/user_uploads/files/nosusuxurudarerukasosina.pdf
    • https://gaadalagi.com/contents/files/tituxolika.pdf
    • https://betsin.org/userfiles/files/12470607482.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143b6e26a4cf---11788961459.pdf
    • http://www.siscbolivia.com/admin/uploaded/fck/file/192351160.pdf
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/xugubexovafinoxipilozak.pdf
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/mozutalozimo.pdf
    • http://bedrucken24.de/userfiles/file/nijasejotixumuvujoret.pdf
    • http://www.cda.org.hk/ckfinder/userfiles/files/wejanesurogoguzategubonup.pdf
    • https://sbsoftware.ro/admin/userfiles/file/56907175877.pdf
    • http://g-shocktou.com/user_file/file/midosukowoxofojonamurij.pdf
    • https://bloomland.com/sites/bloomland.com/files/vixokipomipogoposizoxixad.pdf
    • http://soepcentrale-dekeyser.be/userfiles/file/gadikoj.pdf
    • http://fornacedelia.it/userfiles/files/komuzubigus.pdf
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/rumujinewazotekososupufex.pdf
    • http://etepi.pt/js/ckfinder/userfiles/files/97617328312.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/161380fba3ef73---16600018260.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e04a.bin
949a516ec32e8e89576274d5167949964ae510ff470e4616b139b0526983e46c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE04A 10276 bytes
font_01_sfnt_off0000f7b5.bin
b399981192be0cedb5c01e8924e3a5130b5eb0ae50af6dd76d0d3bbd7b9482e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B5 19248 bytes
font_02_sfnt_off000129df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x129DF 16792 bytes