Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0f686369b61cb3…

MALICIOUS

PDF

86.2 KB Created: 2021-09-24 12:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 92c365f9afac120866ba8127081b9406 SHA-1: 197bab13d4c2cf8aeaee29d71223a49e613a3ff4 SHA-256: 1e0f686369b61cb3e56e5a9dc625e337ae87cbd55ad23044d41efd78055f2728
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many of which point to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern, likely leading to the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://oniceh.ru/uplcv?utm_term=football+manager+20+apk PDF link annotation
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fcba115ddc---kigadevexenoki.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/45789729550.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc3789ed58---89399631955.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/diraroxebej.pdfIn PDF document text
    • https://anakmeong.com/contents/files/76675064265.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/aecc98714c9da314b941454b673a6b52/puvase.pdfIn PDF document text
    • https://pt2-turbo-j3t.com/contents/files/2636848872.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/gutitaravi.pdfIn PDF document text
    • https://pt2-turbo-j3t.com/contents/files/lezapenosilutuzujenaku.pdfIn PDF document text
    • http://japhina.com/upload/file/67939981141.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/farolukopevekunisejuvik.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/6794501617.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/jajijuwe.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d00cde4de---31746736095.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326e26909db---zetekisuxisonisa.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/56639309490.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/58705366868.pdfIn PDF document text
    • http://alhegazgroup.com/userfiles/file/gasarilore.pdfIn PDF document text
    • http://ageddfjtjgrade.pretty-match.com/upload/files/zudikulafe.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/jazubiloserofavovanapije.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/fabagik.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/68497376662.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/bebipupabenamovuw.pdfIn PDF document text
    • https://dmshospital.com/mm_engg/files/40013056801.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_off0000ebe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE2 10784 bytes
SHA-256: a93c8c04dd76e02e690f57bd9a77b601ef148d94179340eff9fa7142485e5f40
font_01_sfnt_off0001048e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA0 18112 bytes
SHA-256: b0013e04a9cfa9c25998747d12c007d3b9efe507fd1f687eb0e27f08bf74831c

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