Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a373526b679a479…

MALICIOUS

PDF

92.2 KB Created: 2021-08-19 13:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: bbec06409851e640e1dce921db230223 SHA-1: da19c9bf5c215c350f476d2a2c82c045899528e3 SHA-256: 1a373526b679a4791bc89ae5b819acad25da00ba6351a635636d16e6f3de18f5
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded JavaScript and multiple links pointing to compromised WordPress sites, indicating an attempt to redirect users to malicious content. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests a phishing attempt related to financial transactions. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/c2476e27fbdd3f31a143f8d76e04be23/magodezevowunobojelibal.pdf In PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/zedod.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/26190237668.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bac6486a7d---86358442628.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/26632855958.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c92fe8d67---derafobarufujev.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/93461545826.pdfIn PDF document text
    • http://midel.me/userfiles/file/kazilumebutope.pdfIn PDF document text
    • https://ultralloy.net/upload/files/losujidul.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088fdaad3318---dunidegumuwutudarev.pdfIn PDF document text
    • https://ags-car.com/upload/files/tubapadem.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/afbedfc52c7148fe2afceca7a662a28c/29361503584.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e53f542c401---jajuno.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160acef0c05566---56110025943.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/gm1l3hri0do5c480v5k0af90s1/rinisipudenulalavaz.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16105024da2a67---nuvevamovufixowumudesugaz.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/39386051800.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/72368029291.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/29955702846.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/7678906452.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d213629680---85597498157.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/dikokevivuwop.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/424d84fea62ef3c36c9de8fb1e3526fd/pokogatetiwuzujiti.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609486211ef68---jekevitezoji.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/mrt55oebu3hbi414qb90pjarre/2841546401.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=unblocked+games+wtf+fortnitePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001047a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C91 11144 bytes
SHA-256: c5fecdb2f8ef5d5f7ee4a95839a07ab044e8ff321b6f08a6e0372fe05fb873e3
font_02_sfnt_off0001366c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1366C 17096 bytes
SHA-256: ed040800979d10e8afac3ce7c7671be17d9e72b9b5046fbf4a86d680d2a59b5c

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