Malicious PDF — malware analysis report

Static analysis result for SHA-256 429b541f63e5d822…

MALICIOUS

PDF

89.2 KB Created: 2021-06-30 01:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7ea054f570c8fd4458fa4502f0fcee35 SHA-1: 0f7b305656540a6a5f4acb22742b0a5e78da8f56 SHA-256: 429b541f63e5d8229be051354902e19d4a550862363eab64b9b6d22147ccb7a0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous links, many of which point to compromised websites or link farms. The URLs suggest a lure related to 'trading strategies' to entice users to click, likely leading to a malware download or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://shreenathtechnologies.com/userfiles/file/tifabunilutifomagowati.pdf In PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac56d24ec76---buvovogeselutitobamibo.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/64021939641.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/8ujbpuo9d0ud0q9obcnkv4njgs/zereronemonoli.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/8f1dab6e3684ac7b02918caa0232e159/51844673967.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/a8f63abd7860d542356f54df826335fd/11419087823.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/c3e9e6ae56846c64577049598e0cf14a/pavilonorepewidefimat.pdfIn PDF document text
    • http://korean-school.hu/hangul/userfiles/file/wopubipixut.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/36a498d57922ff908c1cfb6bf49d0f9d/sokokigegilesamirarab.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/41521436072.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3fed8dbaf---66320735800.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a50093a4d8c---bisalokofo.pdfIn PDF document text
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/d5bi61i13effe7pb2g048be3j2/webokoz.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80b04a5f20---21202141761.pdfIn PDF document text
    • http://feuerwehrobrigheim.de/upload/files/kubudekolo.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/42019184220.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae661c76374---94360795505.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf5bc8b66b---88229398475.pdfIn PDF document text
    • https://ksuskalology.com/images/file/11113640667.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609dae86f3503---62310985388.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/85885616070.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/12797808025.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/a33657deb1f07494dc56bd58e931a412/lipelipogarexezeronomo.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/63205297174.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf609c120fb---midasabepajawalulobukutu.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cad8f2d817---56095196880.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=short+term+trading+strategies+that+work+pdf+free+downloadPDF 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_off0000f816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF816 17496 bytes
SHA-256: 92754a9145a76edee2a9b646a6170a9276b7b87178509385cf543c16de62f383
font_01_sfnt_off00012511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12511 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D28 11200 bytes
SHA-256: 3ddfb437df27c7c3f6e0e18f0d47769303b5f0570bdd6a337cbbff0e5f986713

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