Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e264382cb2962e…

MALICIOUS

PDF

82.9 KB Created: 2021-09-15 18:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 846806829add2f1f10d90c461f63488d SHA-1: 591ea1ebc6130a2bcd8843bf12ff4b1bd3bf79e7 SHA-256: b2e264382cb2962e004fab186c96cf0ee5caa8c738315052d42aa343036de3aa
164 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised websites or disposable hosting, suggesting a link farm or redirection mechanism. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irlanc.ru/uplcv?utm_term=the+conjuring+2+full+movie+tamil+download PDF link annotation
    • https://www.privathospitaletkollund.com/ckfinder/userfiles/files/2701022947.pdfIn PDF document text
    • https://atputasbaze.lv/images/userfiles/files/guremum.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/fetiwuvigugovix.pdfIn PDF document text
    • https://777mto.info/contents/files/gajawigapiwuxawiz.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/83775007683.pdfIn PDF document text
    • http://polins.org/public/userfiles/file/vosaw.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c5924b488---45116863904.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/3f3cd1677a7644e023a7ae5cd61e5e7a/82596702110.pdfIn PDF document text
    • http://fred-robin.com/ckfinder/userfiles/files/21782802123.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613db0f6d97b9---lagomipawifurenativixit.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/potuvibomivefi.pdfIn PDF document text
    • http://biomax.shop/filespath/files/20210913172649.pdfIn PDF document text
    • http://arucax.am/user_images/file/63706356045.pdfIn PDF document text
    • http://architettoannalisatinelli.it/userfiles/files/pojunar.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/biron.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/tadexuvawutuxowidosobu.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/60624557916.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/tupapifomoxe.pdfIn PDF document text
    • https://dd-inside.de/userfile/file/99203029906.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/bopakewexafidewo.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/toxuwos.pdfIn PDF document text
    • http://harckocsik.hu/userfiles/file/lamutil.pdfIn PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/jufoturipu.pdfIn PDF document text
    • 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_off0000de97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE97 11220 bytes
SHA-256: 664d3be0eb5529de42e0b8f751b08251f63db430d1ed1879876b8116d9c8ad2a
font_01_sfnt_off0000f887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF887 17740 bytes
SHA-256: 12393c34986eb6cfe41d0129c87b360d16a3a5aa200466d1a0668492b26bc218
font_02_sfnt_off000125e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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