Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ac2500c9bf2cb9…

MALICIOUS

PDF

73.5 KB Created: 2021-09-03 16:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 60cc862887e2edf5b1308722f8e6bb32 SHA-1: fd0fe597ba9d93d98172f6ffe882c213635c1c7d SHA-256: e1ac2500c9bf2cb9205a59826a559eb09e4f7bb7bf935226b03acc3bc1d998a2
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm designed to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.antoniopopolizio.it/ckfinder/userfiles/files/xabateluxaf.pdf In PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/nav3nlolk97j6sbb2b5vtiddm7/fegubiwuxazokuki.pdfIn PDF document text
    • http://unseretochter.com/images/file/verebibufosimumomo.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a702f0693e2---45125789828.pdfIn PDF document text
    • http://mileschapelcme.org/clients/9/9b/9b85db73e8c1d5ae3bc18b6db4f26039/File/48269748081.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db39ae1fc3---segitabu.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/dorebafevirigugo.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/48284736254.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/tasezigexit.pdfIn PDF document text
    • http://quiltingacademy.net/fckeditor/userfiles/file/jojinabavuzejejitix.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073be4c36997---28495310592.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/4r0hv076armj6p5jlc12g8ufb2/tapaverewobiluvuvaxudetu.pdfIn PDF document text
    • https://umartravel.com/files/sefiparebixi.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/52919708954.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af89f956649---vuwezogebajepalisonizos.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/73363096207.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/33442746391.pdfIn PDF document text
    • https://camphacement.vn/upload/files/61082601564.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/po5gankapavlfs5f6bdo787hfo/lusaripilok.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/lugidabasubogesusakexaje.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/gididenugop.pdfIn PDF document text
    • https://axlthailand.com/imagexx/files/73218615551.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/930adab5ef43e04cc573efbc2f478590/dudowuligo.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/letuzomokumemida.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=geometry+dilations+worksheetPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA1F 17512 bytes
SHA-256: 3f04c024801cbd10d074f69035e2e78543dbf17d95470f6acbb5c51de535554f
font_01_sfnt_off0000e7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ffc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC3 10844 bytes
SHA-256: ff43cb1f68e7c755a055eb089771e5b833adaad43b040dd3fe3e2862c6fa71ed