Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d45649f74a5e946…

MALICIOUS

PDF

130.0 KB Created: 2021-08-20 21:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 47a2ad571369069c1a445ced5fee1c6e SHA-1: 2449ff949564fad7c04c27aeeaabceef476dad29 SHA-256: 3d45649f74a5e94606154686b0322f6c8b748b1a16db54f59a3447d81fb5a092
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites. This suggests the document is designed to exploit vulnerabilities or redirect users to malicious content, likely as part of a phishing campaign. The embedded JavaScript is likely used to facilitate the download or execution of a secondary payload.

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 http://victoryelectricalsupply.com/ckfinder/userfiles/files/kixumigeniturubafin.pdf In PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/wapugefisak.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/72f281ecdb17136e9d06fed8ca536bc6/zuxuxinuwewelusijusatef.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/206841126b65b62926352c5ae20c52f3/wesofut.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/0f5c2ea7b5d34e9bc27cbe6265eea89c/62908353503.pdfIn PDF document text
    • https://krone-murten.ch/userfiles/files/nofigigado.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/17629174d70eaf14ef50065ea91b0f23/63831776416.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/66820845229.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/7926eadff2387dc44edf6e41b3968d13/sujelamogaf.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090381854cd6---sukegonapapif.pdfIn PDF document text
    • https://cheesykeju.com/contents//files/70791923669.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/perolujijaxawa.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af93613656a---56709096793.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/29892655814.pdfIn PDF document text
    • http://www.asslar.de/downloads/33585039266.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/xasefuvonogivozi.pdfIn PDF document text
    • http://about-dogs.ru/upload/file/47286465737.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1607563885c593---93489745950.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/933786fa5b630bbdc8540a31a7eece95/zarizamenelukupozuno.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a02e0bc34c1---xilomilobexowapipanawito.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/l7am7cfd1d6t7fhihb7v77l97u/94398482466.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7741d33eb---mutapefajaxiruduf.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cbfecbdf9---ripev.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/68802475419.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=espejos+siniestros+1+pelicula+completa+en+espa%C3%B1olPDF 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_off0001935c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1935C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001ab73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB73 11004 bytes
SHA-256: 885f91dbe6c123e36e1c95c79f5248736da20e813b565b51550c1a61aabf5905
font_02_sfnt_off0001c4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C4C6 19440 bytes
SHA-256: 04dbe9b8ed62f209fbd3993f51558e4065c78043c181859b6d01e86150761b6a