Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c44c9b89317adf…

MALICIOUS

PDF

83.5 KB Created: 2021-08-18 18:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 841b4efaaf93ebf748d0df961262a767 SHA-1: 0656b9a14efa9481b6e5b4936fe0a6f2dc1d89a3 SHA-256: 06c44c9b89317adf3b8f81f63361a95b13b8156e3dee84aa2e9d2eb8042d9914
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 as malicious, including a ML classifier and ClamAV detection for phishing and trojan activity. It contains a link farm pointing to numerous domains, some of which are hosted on compromised CMS uploads or appear to be disposable. The primary purpose seems to be directing users to external, potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://lighthouse-connection.at/myPix/file/sajigusowopi.pdf In PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210629141532.pdfIn PDF document text
    • http://canadanur.com/resimler/files/87142226209.pdfIn PDF document text
    • http://goldmustang.com/files/files/wasatigajose.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/gm1c3jvksmjos4h0n9ce3cfmum/xugeles.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/m64kt5k6j51vkfu7jtdc1sr1s6/23886674027.pdfIn PDF document text
    • https://mikludava.lt/images/files/6941181664.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/91039611641.pdfIn PDF document text
    • http://termocity.by/pics/files/14413392650.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/27533441558.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/67267134981.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/nutafewab.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/t6geqs8tng58g0olhbqmajg7n0/sotokijadusoxigakirisafej.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/fapezabajuw.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-8-9/20210809000312526931.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6480bb0e8---nevogobutewekipezegoxova.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/83305247038.pdfIn PDF document text
    • https://andhimazhai.com/images/files/buwivalitiwukeb.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/nowijazodanixowinev.pdfIn PDF document text
    • http://oishisushigd.com/uploads/files/kukasujurinevus.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/hkel1cj2598o6dfgqfbq1eucl0/74458699382.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/3f159dc3e0529c6a52c48bb176a37fbf/bolow.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b73a37d1239---58470812294.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/s7ijumak2hu29rh92ealhfc14b/62721893028.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/92313289190.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/63431815782.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=ejemplo+de+carta+poder+simple+en+el+peruPDF 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_off0000e222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE222 10888 bytes
SHA-256: 6acd0fb8d666e5fb5b9b823027b3bb1a4e89d5570d04e696c7d941ae3e4ded0e
font_01_sfnt_off0000fb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB35 17360 bytes
SHA-256: 551801ef9053af46e834db324a9419aa29b1c3625dbca2996c6fe76b5efbaeb9
font_02_sfnt_off000126f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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