Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6ae1456389e2fc…

MALICIOUS

PDF

91.5 KB Created: 2021-06-27 03:32:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cad268341ff59b91d29e999bec4a2728 SHA-1: 5ec824f847b97aeb102ad564b7860515ad847bae SHA-256: 7e6ae1456389e2fc0d353926924209a14cbbf1682e0d8913a0d28c3e28c5de4e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates these links are likely part of a link farm designed to manipulate search engine results or direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

Heuristics 6

  • 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.
  • 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://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/68e250b7ca909e4de4f65057120b49ad/wozagumuwefomu.pdf
    • http://www.pzkexie.com/up_files/file/43415412599.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805dfe1d25c---lobivunadimugutazadutov.pdf
    • https://tavcam.com/upload/ckfinder/files/niviwenekeworuravizapu.pdf
    • https://parfumzone.ro/files/file/33537854875.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/9efrhrgl1o729v2ra32sms7ar8/99752556030.pdf
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/49065037182.pdf
    • https://isabellepieman.com/userfiles/file/17210014304.pdf
    • https://mariapolis.net/ckfinder/userfiles/files/57247075486.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/742b43b21a59db627e6cf651a2f55dc9/24287000864.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b9892ea216e---kisudovowetu.pdf
    • http://on-video.com/movies/movie_data/file/4243370229.pdf
    • http://thecoferfamily.com/clients/7/78/7892d776c92a08c80f86ebc6236678d2/File/16628942005.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160875fbb76aab---93643696621.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b1c54cdae---sakijonorutikotexa.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/077ef4ff172ef4880dc707b9d5535287/fujusi.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c200166aaf0---69006100242.pdf
    • http://allaboutdowney.com/userimages/4329381704.pdf
    • http://ducthoaudio.com/upload/files/tenipimunotu.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b998eecabcd---23400487324.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0f31f422b---60210458635.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef83188021---34177140680.pdf
    • http://www.anclupnapoli.it/userfiles/file/katerapewozi.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078bc676817a---bitobipe.pdf
    • http://sanga.asia/userData/board/file/18062053906.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160873c1a54cb5---jozonubusafezo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=ar+answers+to+books
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb5f.bin
7051bb53d51d9132bf1d8c5c6858b92b5d69ebe0b8aa9212b0af4f460f50f682
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5F 10260 bytes
font_01_sfnt_off000102b7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102B7 16792 bytes
font_02_sfnt_off00011ac9.bin
fa7ed29284ff1ac583bde1332f6333f96650f671ee9d08c258012a03f5d50498
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC9 18224 bytes
font_03_sfnt_off00014a24.bin
bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A24 16252 bytes