Malicious PDF — malware analysis report

Static analysis result for SHA-256 472018a06217ede2…

MALICIOUS

PDF

83.2 KB Created: 2021-09-17 20:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: becd3dd4db2c0729646c4c3cbef95171 SHA-1: d8be80cb2847b419bc3c113e4d0be47aa02ba20f SHA-256: 472018a06217ede23e71a74f1b33a57c809ec6e428f71e1dfd0e0700acf6b068
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://azstorestudio.com/uploads/files/tomofixa.pdf In PDF document text
    • http://christmaslandint.com/userfiles/pagokexetubiv.pdfIn PDF document text
    • https://maritime-models.com/userfiles/file/bumolijudaripebevimin.pdfIn PDF document text
    • https://igk-lilienthal.de/downloads/supikonemawemoxalad.pdfIn PDF document text
    • https://himalayanespresso.com/espresso_ckfinder/userfiles/files/3098305369.pdfIn PDF document text
    • http://balone.net/_upload/file///33836321305.pdfIn PDF document text
    • http://opsir.eu/files/file/48592075090.pdfIn PDF document text
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/nujedokafedowob.pdfIn PDF document text
    • https://agros.net/uploads/file/61891491436.pdfIn PDF document text
    • http://only-svet.ru/upload/files/70412806712.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e78f04f3fd---genuxofelisisa.pdfIn PDF document text
    • https://pannonfinanz.eu/editor_up/32467274449.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/311725128.pdfIn PDF document text
    • http://hitelesen.com/userfiles/file/seragigilefifobufe.pdfIn PDF document text
    • http://52963566.com/upload/file/202109061750426915.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///jezoforowonejinadapeb.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/42f1bc846f7376e3e4b7eea1a7c15cd1/18779429763.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5b25d7a04---15363752526.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/161315b9da4cdc---43014314315.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/88f6678a7ec04341c778e49605daf0dd/5698041806.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/wuluxex.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/12139901278.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=add+exchange+calendar+to+androidPDF 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_off0000df78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF78 18388 bytes
SHA-256: c2658de16f23bdd0587aed526a9ef333a3f4fb3e4eb57e0c4560a7ea6690da8c
font_01_sfnt_off00010f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12742 10564 bytes
SHA-256: 91f41f636a6c3883f4abf53c83f7390542d7618a08c4e30b89a3e393cc9542ba