Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a8848cb199a7b9…

MALICIOUS

PDF

87.0 KB Created: 2021-06-27 08:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 07d958108fc06ad6fcd61eac220a3d27 SHA-1: 4bd30926544343c60ff7e3a85e89a44abe6542a2 SHA-256: e6a8848cb199a7b9f38d4088cca400ea635af8026b7cc76794fe17f7eac07c49
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress upload directories and other disposable hosting sites. The primary purpose appears to be directing users to malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084e1dc233f5---30730319349.pdf
    • http://ty-universe.com/image/files/20210617_213251.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/7b009f088a02a7454e07faf9319ff7e0/bimemasifor.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/cbe1q6jpjpmsv53jqfm7kv5inh/5785638559.pdf
    • http://www.flamanville-76.fr/upload/file/masibodibiveb.pdf
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/90c9ff899459a889a6fface298999827/82480910792.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/e14525bd9eb90bc8d860b505fe6859df/59896523677.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c0eb75eae---77011226625.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a59421678a7---fetuwunujujomu.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607442c656322---76350986518.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55ed7b2c94---69940193472.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8b89a3325---78261225310.pdf
    • http://www.amedna.com/userfiles/files/gajovub.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/f0a9947b2ed0ce4bc535654328039cd7/lisilofoxuxotune.pdf
    • http://akkoryazilim.com/userfiles/file/68686604901.pdf
    • https://srmhospitalities.com/images/bulk_images/files/suridonunozeregefugiwigim.pdf
    • http://yonseri.org/userfiles/files/69487171394.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0176b20280---jimikemevijosiga.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5448f20b3---welasipujafenan.pdf
    • http://www.pranabkumar.com/fckimages/file/27001304925.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac10ebada26---pulalaguduwekad.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607115113c2d3---zokiwowi.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160848f34262d4---gepitijowowapuji.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/f0fb721401d07973afea834af19f4e1f/41864054932.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160943effa7776---gupasopub.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=anal+on+stool
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f353.bin
83ab0876a64251ead58ab50a8b9c91f86fb647ad80b5a6fca6b82c915fda0730		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF353 17992 bytes
font_01_sfnt_off0001215e.bin
9ba3a490adcce472c30596fafd4fce71bf2f6daea2238e07ba0b2bcfbe4b58aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1215E 9756 bytes
font_02_sfnt_off000136ea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136EA 16792 bytes

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