Malicious PDF — malware analysis report

Static analysis result for SHA-256 607ea6acdb15a1d6…

MALICIOUS

PDF

100.5 KB Created: 2021-06-26 20:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f3ed565a0ae7758990ae197ab616597c SHA-1: 7aa8ffc72664573dfe682548a74d00fe3b666d86 SHA-256: 607ea6acdb15a1d6c818a5f0769475a93b0e650358da7c4ec9156d1e9dc5c8de
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised WordPress installations or disposable domains. The presence of numerous links, including one with 'pokemon+go+hack' in the URL, suggests a lure to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b5bd313ce---97107563022.pdf In PDF document text
    • http://ecotrans.vn/upload/userfiles/files/32380301081.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cecc223829---netuneli.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825108b6753---fojukulos.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/a6f1ae5664d411b262fa02636adca843/senojivabasosozuwamotesep.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/7uf8meki563hcml3itn35h4020/10949202363.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/zofoxiluwuwifakexavirutaj.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9a1327df9---77442325589.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca676e5ebc---tuvazoriwasevat.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/df321cb00e55546ea442184551461ab4/82860164440.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b0c68a4b1---fiwujasizofasoxurek.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/15726787360c01148856b4.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e88d31a4cf---jexekudivitixusi.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/r6cr77re6p3lusl49nqubn7v43/rukugugafoxuzi.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/16814024560.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fcbe404ec9---12651591199.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/wunapalevowig.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/72105202605.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/79359817687.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/32699638814.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=pokemon+go+hack+android+no+rootPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000135a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A8 10696 bytes
SHA-256: a6ab03c37463c304e13696ab97561a4a43fb17b18507e79981c54a4c0201cc4c
font_02_sfnt_off00014dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DCE 17992 bytes
SHA-256: 1a92dbd4e3f29c15c71fc32e3a7115355c5cb0849703fc8f93b13a68aa408d49
font_03_sfnt_off00017c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C8C 1692 bytes
SHA-256: 6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13

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