Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf6a84e22a9a08e…

MALICIOUS

PDF

76.8 KB Created: 2021-09-10 13:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: abaa1aecd367fe50e6dceedc0859470f SHA-1: 9ecc6f479e8aed5258afeefbb553b35f7a2e6a67 SHA-256: 0cf6a84e22a9a08e29daecafa0efb42d2799e6acbe2ba6a156f218fed39be358
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features numerous external links, with several pointing to compromised CMS upload directories and disposable hosting, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://breedlife.com/upload/files/wanevujededitub.pdf In PDF document text
    • https://durimawar.com/contents/files/43195344944.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/tuzikatadi.pdfIn PDF document text
    • http://lishasurgical.in/ckeditor/ckfinder/userfiles/files/58509955997.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/genoza.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/tamexinasulerema.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/88648835618.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/fa5315eee000c350b719ee074042b0e6/24594194713.pdfIn PDF document text
    • http://c-six.it/userfiles/files/zixufuvavomivugejos.pdfIn PDF document text
    • https://patoman.ro/ckfinder/userfiles/files/dasavasifuxejezuv.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/fagon.pdfIn PDF document text
    • http://12shio2.com/contents/files/tatazarejufib.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/60326756924.pdfIn PDF document text
    • http://e-baze.lv/images/site/file/50697963842.pdfIn PDF document text
    • http://inggeo.eu/userfiles/files/50566623428.pdfIn PDF document text
    • http://gok-maciejowice.pl/js/ckfinder/userfiles/files/73568739789.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613662996e0fe---6223564247.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/pikilifer.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/52721706998.pdfIn PDF document text
    • https://kompaspt1.com/contents/files/punoborum.pdfIn PDF document text
    • https://muahohangnhat.com/app/webroot/uploads/files/60018891185.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/91426596107.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/23113444259.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314cf58d8f9---jumaturalokedotuka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+watch+prison+break+for+freePDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79F 17596 bytes
SHA-256: c4a378f122644e9e13c4dccae46e29571e7b4ea8a26a358c24055e50875a4845
font_01_sfnt_off0000f50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50C 10840 bytes
SHA-256: d3e29344832e5c9e85a991d99f88f2968022fe2f236d0c2e007d0c87c8ed4908
font_02_sfnt_off00010ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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