Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0eb330054be755…

MALICIOUS

PDF

78.3 KB Created: 2021-07-27 11:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 967e2aa71876eeac61ba8f870f11592d SHA-1: 5046763ebb02581defbc9fbe0b8226e3e3e90889 SHA-256: ab0eb330054be755d6ac8eb5a15c16c2bd414c333c31157ead2f19f81fc378aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to compromised CMS upload storage, suggesting an attempt to redirect users to malicious content. The PDF's structure and embedded links indicate it's likely part of a phishing campaign or a distribution vector for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/edodgtkshhn75onv5chi2jv15u/vilasepekigenewufekig.pdf In PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/12696b2c545fdb82ef873b49da2c3e98/tupifoga.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/ll1o9o635uovj2k855i64b1s36/tiguvolarumidubosefefudu.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/mesasur.pdfIn PDF document text
    • http://ccapostolicchurch.org/clients/1/19/19d200bce63520a637954fb60b162b1a/File/repuduvefax.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc8cc28b0f---xokejesasepugolojiz.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/v3dpkrnc0mad9vdlaunfrnt541/19748156007.pdfIn PDF document text
    • http://anysoldierfundraiser.com/clients/a/af/af293656121fcb8b60a8c910089dd81c/File/98592412844.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/53213183783.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/f6f2a85ddbdc2b29ecae1bf3401d5e0d/45061215926.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/06/12/ratirigolikefosajug.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2731821ec---juxirak.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9403cc8ace---supepazel.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/24109063057.pdfIn PDF document text
    • http://www.monts.sk/upload_images/file/40448203613.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/jazodigogulixebizog.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/27477368ae300c1b8d7328800009a4bb/tuziz.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72081063694.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2aa78d62dd---dogota.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/9aedd27b4758f25f6cd56679492adedc/82085602340.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/lesikotokiduvo.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/zoside.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/46754405390.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=tabla+de+posiciones+liga+ecuador+2020PDF 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_off0000cc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC39 17544 bytes
SHA-256: 5c50812e55832d4794317d16db2555a6ada9b4f586ab472ffb7bc59ecf774f1a
font_01_sfnt_off0000f8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F0 11036 bytes
SHA-256: d5ec7bb4d1801c14f6de04687ac7e750469b57a6bbe294a81550940358deb605
font_02_sfnt_off00011251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11251 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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