Malicious PDF — malware analysis report

Static analysis result for SHA-256 24f1f4a568e19b0d…

MALICIOUS

PDF

110.0 KB Created: 2021-08-09 19:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 6b6eb88773609f6b9063811cf4a530dc SHA-1: 2968af705fdaf4c9e4d54a1b4ebdcce9ec2a27e2 SHA-256: 24f1f4a568e19b0db1eafd8356b974864591c568ed0c104cffed97a60cd8e1df
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a 'Password-protected archive handoff' heuristic suggests the document's purpose is to trick the user into decrypting a malicious payload. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/3016dfc3fbc0803f8f5d59a1a6f00134/jisisotodakodotenabewoxa.pdf In PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/jatopizevodalularum.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/1fd94dc1496d510bea435f2937472584/wusilamuj.pdfIn PDF document text
    • http://beming.com/ressource/site-image/files/95356054905.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/39029394757.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608294f31cf43---49339817677.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/86993d94f4e177cd4078a418be382427/kisepemefolewitebego.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/tixexerobike.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099f09db58a4---wofozuforomew.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/bc9a5ad0bb1c051bbc72edd62c324a98/sunoboweziwujugavamukejel.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/43437471307.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/aqflitd1up36kf1vlcbfbg5sfn/sikamedetoturarewozimikig.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/76540409810.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/d63b6a95dfdaa5542c4159b6bb5a639d/guxudadokuvax.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/witikeromolasuxajitega.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783ca743a89---97380275581.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c724a5b7aa---solinumofawu.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/63f1ffe9b33ad0da932f6e7b2f9439ee/belozowuwosemefirolisiden.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/7a052a168a7ee1b5f609d74855240533/63387161172.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/betokedetisizuliju.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607417f778123---14271665227.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/wobigukugagezoro.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/78445376205.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6a4fb820f---55768531841.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+change+text+color+in+pdf+xchange+editorPDF 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_off00014831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14831 18060 bytes
SHA-256: 50acb1787b156c28f6b19dc4dd93a213a44d1d0a86b7f51e4b64cfd8096c0134
font_01_sfnt_off0001779b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1779B 10908 bytes
SHA-256: 37570aef96b66be808bad96589c68adccad6835cbd87bca38f03db8a66d094d8
font_02_sfnt_off0001909b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1909B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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