Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0527ca9ad735b3…

MALICIOUS

PDF

87.6 KB Created: 2021-06-11 05:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: de30c8c0eb7c6a0253e626a140de1b98 SHA-1: deda569150600537ee97f0eb167da972aabf6136 SHA-256: ee0527ca9ad735b3b94730b892cfb02986a42662a0b74c745af933b1b74289fb
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. The document contains instructions to disable security software, a common tactic to facilitate further malicious activity. It also features numerous links to compromised WordPress sites and disposable hosting, suggesting it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://medvor.ru/uplcv?utm_term=need+for+speed+most+wanted+2012+compressed PDF link annotation
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c894de110b---tutanoxazigitezuw.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f98dbc669---mivibijivijo.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/zumitafizomuwenesika.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b3075ebaa---mewepuliwapisilogemu.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/frm1asoemrfeqt7hn5dpvjb0uu/lolokafafipazeduvamume.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/fbf7a589a2d32dc947437d5992a7662f/xupusaro.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/r9eb0mq77fng2qnn48ntt4805r/pamivepatu.pdfIn PDF document text
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/rukonikijipe.pdfIn PDF document text
    • http://berbun.com/user_img/file/rasumegojexuxanajivexom.pdfIn PDF document text
    • http://01host.ru/userfiles/files/juwofexixeroxetubemuwa.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075318adb278---15958229302.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1608f35f92f910---17187695263.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/99016519762.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/77a82a8e77ecb3b8dc43745bf7049c7e/gufakemadi.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/t3e09gnfvs2gealb2bpvhjjd4l/ninusagakotagov.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/532023ffdcafeb9e70bbba1c7c69bb4d/tewexovopogafomexe.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/81834098403.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001152f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152F 5656 bytes
SHA-256: b101e8a2f5c244a297c3d7a0cb9ba4a1dceffd3d81ee63668f49d0eafabb19bd
font_01_sfnt_off00012880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12880 11500 bytes
SHA-256: f6f47255d8170e498e3d97c292108f9562769047804dff835c47667ade95bc74

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