Malicious PDF — malware analysis report

Static analysis result for SHA-256 04dee745da489bce…

MALICIOUS

PDF

92.9 KB Created: 2021-06-26 13:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d3b5e8bb070ef4efbc2c85bfbabe6a45 SHA-1: 6152aac38caf71ebe8ad636776f37b467c395228 SHA-256: 04dee745da489bce83424a89f8e807441144448d76a85c0588dddffb17f0a46d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage, suggesting it's used to host or redirect to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure, likely leveraging a compromised CMS to host the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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 http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160d6519c81d84---87868402918.pdf In PDF document text
    • http://allamericannursing.com/userfiles/file/gagejawamesazowobitosug.pdfIn PDF document text
    • http://kbchina.de/upload/damuvuk.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ddff47366---69662906955.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086da541b513---delerodofofukaru.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/68e5b55d98be0d6894a2fa47aa1f8a9c/rezibemodifebogogiwadaz.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/82256313420.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/8c077b9a54b2b7a9c8ca08e0a1aedd30/96260683535.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/jetomidedej.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609487671fb3e---1288170462.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/gapac9fsnnspvn6p8othrseiac/92595780004.pdfIn PDF document text
    • http://medi-sen.com/files/files/nijutajefimet.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/75202687634.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/xiwajiwelu.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/13348838577.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16075dceb03f0a---72056681311.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/63b188d6821175c315f8015314562994/99358143293.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/22367548d43131470c1ea2f7298abeb8/79910201139.pdfIn PDF document text
    • http://njuhome.pl/ckfinder/userfiles/files/nonewolunobirawu.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/6f5a8954f8eda640a06c64081e816e27/96355442114.pdfIn PDF document text
    • http://zuche0551.com/upload/file/8387870571.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/8fd316e2008acb979771f985c4522437/delomekujotu.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160afe6e8b60a9---23894141851.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=lady+gaga+she%27s+got+both+hands+in+her+pocketPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EB 16936 bytes
SHA-256: d52475f0cc77f75021c823f7434bc0f8c7ae6f0944def4266721a37b132a586f
font_01_sfnt_off0000fe27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11634 1700 bytes
SHA-256: 15171638d69c9281a983de8a04f8d213e5ed86d33053034f6aa0dd130c4010d8
font_03_sfnt_off00011e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4C 11084 bytes
SHA-256: 7b1ac4922a59962a2878f1abd7b8fadbf0c2d20c7e550e276191bfaca3e5153c
font_04_sfnt_off000137b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B5 18000 bytes
SHA-256: e1a8ce0dc390bbc7a3e129e68b749eacbd6e85eef438014b230fa65df891220a

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