Malicious PDF — malware analysis report

Static analysis result for SHA-256 074d8418c5e8d1c7…

MALICIOUS

PDF

84.6 KB Created: 2021-09-01 10:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: deceac34e75e329812dfd120168af0a4 SHA-1: 0637f8c0186dde6a9808ab8939f4dcd8217ed467 SHA-256: 074d8418c5e8d1c7dc24318afbd4c4aa5f1a51d41cfdd1233e3502c97a90cd91
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to link farms on compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection or download of a secondary payload, contributing to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://simbhaolipower.com/images/file/72975349373.pdf In PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609908a3f3268---geziminivebej.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/12348223298.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d724fed5d8e---rulibixateparera.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/tuboduwomametasepase.pdfIn PDF document text
    • http://com123.vn/uploads/file/19265000007.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/md8agmc86iq5ntpvgsvh817ea7/98021593131.pdfIn PDF document text
    • http://www.llmhospital.com/www/js/ckfinder/userfiles/files/53653465005.pdfIn PDF document text
    • http://ailizia.com/userfiles/faroligevapufifanotetuza.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/75078910689.pdfIn PDF document text
    • http://studioguagnoni.it/userfiles/files/39748639951.pdfIn PDF document text
    • http://elskenecologie.nl/files/diropidulunot.pdfIn PDF document text
    • http://alternatifmedikal.com/img/userfiles/files/81259814001.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/xefumobelo.pdfIn PDF document text
    • https://sanidom.pl/img/file/lezegakofusisimudusu.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/1d7ab2f7d6478308e1739b639db76ab6/11640190855.pdfIn PDF document text
    • https://aldwalia.com/userfiles/files/47051759156.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1611e028d7e82e---zamidavimovumi.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/goragomanezow.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/12476245510.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/vojefejunadijufijazif.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d8c591ff3---xevurunobinitad.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/73312328587.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=best+chewy+fudgy+browniesPDF 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_off0000e29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000faaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAF 18768 bytes
SHA-256: 5ccc98e9c35f66ebcba296fc29fa143568f979059eabee727aeca718a3a0f73b
font_02_sfnt_off00012acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACC 11040 bytes
SHA-256: 0d2631fcda95a356ec709a67d8f5e25015020855fc6f1fd9d929114803b78814