Malicious PDF — malware analysis report

Static analysis result for SHA-256 a215a5dc6eb3d4c6…

MALICIOUS

PDF

71.1 KB Created: 2021-09-27 23:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f547b798e584700a9efdf652a99d36c1 SHA-1: 1e95fa0b8f1f4ca9623b2531a15955b88f42bf3b SHA-256: a215a5dc6eb3d4c686470ba9fd1de616a2b5a335ec9665fb0ade4abb71b3e9ac
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to lure users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pixomot.ru/uplcv?utm_term=filmora+pro+no+watermark+apk PDF link annotation
    • https://searchlink.org/userfiles/file/japas.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/cb7c480854c4f95c3c910113c4f43d4c/47011466938.pdfIn PDF document text
    • https://ebus.myskoolapp.com/FCKeditor/FCKimgUpload/file/xakuvud.pdfIn PDF document text
    • https://strechybenesov.cz/content/66373386313.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/bemuxemeluvugixorunasixa.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/g2tebp03009fbghsnjc070i1a3/fevedazowoxasanorobu.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60669005511.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/dupilabusitulodigi.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/24733633534.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/wawilofeni.pdfIn PDF document text
    • http://casms.org/atts/news-files/file/lidogukosutotogowen.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/12109267951.pdfIn PDF document text
    • http://keemunblacktea.cn/uploads/file/021731579582.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/77957358557.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/nipoz.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/notepafetekonez.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2a8e1584d---bolemezizujazijikavuwipul.pdfPDF link annotation
    • https://portalbime.com/UploadedFiles/New/file/vedebo.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/57533679730.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/161497dfa1310e---wunulidubefekopufun.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/ravukibomimafunuvasudix.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/10628394220.pdfIn PDF document text
    • http://skolky.info/foto/images/file/niwifo.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/12994849477.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C7 17036 bytes
SHA-256: fbc35899486cefeb92bfa48a9a15a6bb8ebfd13333a48438addb52a403c4685d
font_01_sfnt_off0000dee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE6 10400 bytes
SHA-256: 3e4cd34e1684f0bf33ff98a6538206d09472779964e5e3dc1e49cac604a9fea8
font_02_sfnt_off0000f669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF669 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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