Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd94a444a4840a79…

MALICIOUS

PDF

84.3 KB Created: 2021-08-23 14:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cebc4dbab349080706ec29b126b19a41 SHA-1: 0beff5794a5b7b36ebbe5360473d1bc58bc0936c SHA-256: bd94a444a4840a796916f926cfc2552485318edd6884daed897b5b83ce089aec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting. These links likely lead to further malicious content or phishing pages, aiming to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • 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://nomylo.ru/uplcv?utm_term=5th+grade+reading+comprehension+worksheets+multiple+choice PDF link annotation
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/d67b6501135530717d34e7ca18cbbfc9/80407060255.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0d5a448f9---54861607182.pdfIn PDF document text
    • http://reckdance.pl/userfiles/file/kezogot.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/xipowutotewojufafo.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/24613134902.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/jowibelo.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/galaw.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c86c47a419---13386606753.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/bidegetawulegi.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/20299485443.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092718a3b369---dovowusezonowaxaka.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/38940187458.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/4155083431.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160de0e07ce273---fusizupifafififu.pdfIn PDF document text
    • http://hbleg.com/admin/userfiles/files/21459437689.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e829c157b5---jimadametoroliwutu.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/5de46c542e296b71eaa7051ab728c210/96408859384.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/rezakapitogubekofopukex.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e0a615294---71952095776.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/faxogefopid.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/8bb9ecf63a39232dc1c20f43805a4193/43215856761.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/95213048485.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5533674a30---jonomexapozafok.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_off0000e51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51E 16576 bytes
SHA-256: 91b4ac2d131b2eafc8646a03ccc51d33b627d0a051cc0ad0c82309f4d779e57f
font_01_sfnt_off0001101a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101A 11276 bytes
SHA-256: d2c2118f638185ca08d4c36579cfff082c0881203f5cab8733ce2afb5de2a815
font_02_sfnt_off00012a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.