Malicious PDF — malware analysis report

Static analysis result for SHA-256 514d43757a10344c…

MALICIOUS

PDF

82.4 KB Created: 2021-09-02 07:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e1b8b979682ad01b92f650c15f5f3534 SHA-1: 5bfec41695b3e7abeb017655aadfe4ecac9c2b46 SHA-256: 514d43757a10344cd646e0e5207faa8a2f18d565ed4e8a9efc6e5ed8ecc2723c
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple links to compromised websites and a deceptive download button, suggesting it is part of a phishing or malware distribution scheme. The presence of external URIs and link farms on potentially disposable hosting further supports its role in directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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=write+to+sell+andy+maslen+pdf PDF link annotation
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607338940fa9c---3080270103.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/febikabaguwumabifazesoje.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/50631762775.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/29783066813.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f781e870ae---jedojelubaviwenog.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/495a5114fbbd73be890aeb0c913f4162/83007434304.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/kadavageguzufimeniwuz.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d80a63adb---paxidum.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/44663800870.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/79201939968.pdfIn PDF document text
    • http://vietsinphar.com/uploads/files/fozefajajixekevexipebis.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/34526631919.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/74903036715.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/cti9q56h18802jjriqthjadt41/rakevukovepobevebigu.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/batanugitozigumatepu.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/57545261061.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/47179359118.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2bb9aa001---18974659777.pdfIn PDF document text
    • http://aweibel.com/Photo/file/bisis.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/kepamozeluwuxikivi.pdfIn PDF document text
    • https://x-software.cz/data/file/6194131387.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c964305a3c---sexunibage.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/kebirulakisip.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b01894ac5f9---futobeboxufudig.pdfIn PDF document text
    • https://edusfera.pl/upload/file/43636024532.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_off0000dc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC48 17720 bytes
SHA-256: 35d1f85963c75c29aae85797476d57e552433fe715ae50c3b7181bd88a77fc78
font_01_sfnt_off0001099a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B1 10764 bytes
SHA-256: 9e026b3d5db7dbba63af64776f72c6c6534ceb97f003ef3ca899671135857bee

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