Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d047169337042b…

MALICIOUS

PDF

72.7 KB Created: 2021-09-17 12:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1d17790f5511f19435bfe3b627eaa6b9 SHA-1: b0efae7bf57fb136c152f0f8c35c55e93bd0f1e8 SHA-256: 02d047169337042bbb0319931a908e1bb1e030558638ca7fb3e4141afebebee1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to malicious sites, as suggested by the PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://garglob.ru/uplcv?utm_term=highschool+dxd+stream+free
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/1acbf339eba8f7108f1eb11ba463641f/narim.pdf
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/dokusitonoburekapezijal.pdf
    • http://davidhammerstein.org/userfiles/file/dijezefopi.pdf
    • http://pfmconsulting.org/survey/userfiles/files/wozafisimubo.pdf
    • http://agapetown.net/ckfinder/userfiles/files/zerorefel.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/18bc28da20740da45f9b3911ef68d4a3/16773858288.pdf
    • http://sys-svinding.dk/userfiles/file/wutajolinuwakijalumera.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/0d97124a93587811b0c0ad8279758548/85268075407.pdf
    • https://alshaabcoop.com/userfiles/file/90286598689.pdf
    • https://smobiil.eu/userfiles/files/tutozikozawuku.pdf
    • http://sahcarpets.com/userfiles/file/442081493.pdf
    • http://konberdbio.com/upload/files/sasagufe.pdf
    • https://crossfitbeeshark.ro/app/webroot/files/userfiles/files/jevixiguxera.pdf
    • http://sbstroy53.ru/img/files/41122542620.pdf
    • https://orangcar.com/app/webroot/upload/files/simafijidumu.pdf
    • http://goodlack.cz/userfiles/file/pebakilezazisazaz.pdf
    • http://fantalife.nl/userfiles/file/44240774680.pdf
    • https://luiginoiobbi.com/userfiles/file/vuvadetuled.pdf
    • https://loffoxfitness.mvwebsolution.com/userfiles/files/nivusofevaguvenibo.pdf
    • http://regalmotors-jp.com/js/upload/files/53022276736.pdf
    • http://gloteckr.com/upload/editor/file/82580480218.pdf
    • http://aytekinpolatel.com/image/files/20584363900.pdf
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/51046047268.pdf
    • https://wietsevoermans.nl/ckfinder/userfiles/files/ludodugadevewenujamafezi.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_off0000b9a9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB9A9 16792 bytes
font_01_sfnt_off0000d1c0.bin
ca5198514cbac12fb752b17411b5cc8d22d68fb78bffa80dc05a7a349385c22f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C0 10912 bytes
font_02_sfnt_off0000eacb.bin
06249f14f52170145d9a45a98e0643b3aa206dc9a95c079804af8266a1d0f807
pdf-font-stream PDF embedded font (sfnt) at offset 0xEACB 16556 bytes