Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04f2cc9dbc700ed…

MALICIOUS

PDF

84.9 KB Created: 2021-09-02 12:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 771873699666c142ca53b35b99d4154b SHA-1: 7379059ac26b1a9b2b8b1a6b6afa378f07db6c81 SHA-256: f04f2cc9dbc700ed37651179ea530d12474e558f8ba2807c6837dc9bfbcd6ce0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as a phishing trojan by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS uploads. The primary purpose appears to be directing users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://aynispirit.nl/userfiles/file/73043268698.pdf In PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/bitivomu.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/detitufidawupu.pdfIn PDF document text
    • http://nature-revive.org/files/file/47183279546.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/80999099612.pdfIn PDF document text
    • http://effekt-film.de/files/file/rozekabulivabixobi.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b878d83883---muwoxopofoseserefawemal.pdfIn PDF document text
    • https://panificioilcavaliere.it/userfiles/files/bonapubumusefo.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/2302087601.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/movozit.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16104578fb8c09---59625743790.pdfIn PDF document text
    • https://xinpayflow.com/ckfinder/userfiles/files/vibikesufovijefep.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/sarowumatik.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/1407ed4ea3e3443117203c99b622bac1/ferulilomotuludeburovuvi.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/eodgqout0hrg8f0v60kmhunk21/bukigegolupevuf.pdfIn PDF document text
    • http://hudsonohiohighschoolclassof1980.net/clients/7/7d/7d4b1ad73701457990394555a34ab01f/File/2687555507.pdfIn PDF document text
    • http://midel.me/userfiles/file/93469586568.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/voronojadedurazufa.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084cf89cb783---wivipepimi.pdfIn PDF document text
    • https://vetamblj.si/ckfinder/userfiles/files/satufojowagetu.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112eacb8311f---maduganuwoxuxur.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca46332da2---29453730767.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/sexobafureku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=manual+vissim+9+espa%C3%B1olPDF 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_off0000e797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE797 10748 bytes
SHA-256: 15e2c9dadc128770cf534f06355fc6be9bac1c56d1550c1d15e351165f0fd29e
font_01_sfnt_off00010008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10008 17348 bytes
SHA-256: 138d42a416bd55745f8569d82a46bc46047d59568558a07a828c7d3dfdd57983
font_02_sfnt_off00012ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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