Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2e7976dbf82e70…

MALICIOUS

PDF

74.9 KB Created: 2021-07-02 23:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f7e93d16327e720f2a144c4ab4516f0d SHA-1: 953b722f1eb38a3a4721471841150b64e1a34149 SHA-256: fd2e7976dbf82e70d980b98952f7d3d3523ec2d8f0eb114d146dbf6115e16299
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to numerous distinct hosts, many of which are associated with compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the structure and URL patterns are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://inbjnews.com/data/cheditor/0603/files/64949491924.pdf In PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/8c94ee07f06c0af6bd2951f0199364be/tiregeti.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/5a29b4cf8f522f75760d44f3cd50f2cf/xibabivarorefeku.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/ro90gul02sccgfm3nlnth25sm1/lutatirasijexej.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c323bd2a551---tunobefaxemawupewataso.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/gepuwugibad.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/1dc27c4b5500bf95a5692b93c4f647ce/tupeluxa.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/kq9dlnc8g08nojitr6q2cav6rh/fusajorexerivutokusirotim.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/46612889999.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ce0c086ff9e---96185641513.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/164d295cfa7e078c6d67c39ee6cae0c7/81450584369.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/h1n4j1ovrff61pdjflqk5uoiiu/wosuzumodi.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/b4a92686f42c3786ba48eab280e7b477/duboj.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce4edad0c97---22104994455.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098473010087---lubisidigoguna.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/aunimrtns88vt0lvc3u59lqri7/xilajorofudelotefevolige.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/8bfb7a1246ba18cb0ce595d5060fc03c/lisunagituw.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081396b4f743---xojapidesela.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/sugutijemonuwabemab.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/43177436734.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608bdd93ca0ea---fubuzogajefiduvidobewekek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=3+letter+words+ending+in+ouPDF 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_off0000c20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC20D 10520 bytes
SHA-256: 7fcf593e0e9050226915299ea45e78d949264295827eecfa28d439fdf4ec433e
font_01_sfnt_off0000d9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F8 17148 bytes
SHA-256: 3138a046980fef6031610ccefa07e5580f753ff28e0ce19346db7b164ab44b88
font_02_sfnt_off000106bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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