Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae857150be66eb93…

MALICIOUS

PDF

82.8 KB Created: 2021-06-29 04:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: de650ea3e042800335a0377251b1a567 SHA-1: 0694efada033caeed16dba801509823c34905587 SHA-256: ae857150be66eb9378b7bce6d1219e5107596a407e8b64e9213af2d2559c915f
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, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple potentially compromised WordPress upload sites and other unknown domains. The embedded URLs suggest an attempt to lead users to phishing or malware download pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • 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://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/c59291a610b8b5fb251bff1a300c3b47/90788090754.pdf In PDF document text
    • http://tencanpowder.com/d/files/nerewumenaz.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/zumesizinogomagozezava.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a1b6e252f---1770804899.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160878b9ed58b7---90213232033.pdfIn PDF document text
    • http://polkovnik.su/upload/file/mimesifibuxalozutaron.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16095b28b39c22---9051671571.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/11257135364.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/mowikejeb.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/4b52724f0b22d98bddac7e97d6775726/91441416523.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/0f741b83e1750f2692537916b7533726/37562193548.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a6673ea7b---bowatixed.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d6f19e32bd8---tixixarekime.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/75335008375.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/63109189621.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/14498421070.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/til848hne3per7glimmr8ga2ja/66666448483.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/mri7v2ogo0ppf7gv0lkf9472tl/48072094107.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/v946mmdv35ojt0gm1oqr32uo4a/99882065475.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c5ee26c78---melipidapu.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f2a0a7a83---40725841202.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/48303570518.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=monopoly+lecture+pptPDF 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_off0000df1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1B 17608 bytes
SHA-256: 6eb7439f4cf388a84e1c6e7eabc6a41a41906137935ad5bdd172459a621530db
font_01_sfnt_off00010d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D94 10152 bytes
SHA-256: 03ef4cb728d59f5d57ee79b8351e35d04cf282951aae134925417f3443e9efcf
font_02_sfnt_off0001247b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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