Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d74481bccb0f0f…

MALICIOUS

PDF

77.8 KB Created: 2021-09-21 01:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e49659e0a58006d5c6c53a17b4a4a314 SHA-1: 552b3f3f0e6e5530e103c0cb722470240cac07b8 SHA-256: 60d74481bccb0f0fca800df16c9ebe3eb52c838f4abc91ed7bfcf61158d1a1c9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to various external URLs, some of which are hosted on compromised CMS uploads, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://er-trans.com/img/produkty/files/37762566225.pdf In PDF document text
    • http://vhktn.at/images/content/files/94230166993.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/8d76cd7f4e989a31772237e3596636ce/newuxonuji.pdfIn PDF document text
    • http://cofetariafraguta.ro/UserFiles/file/lufave.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/nopatinutuxakeginivusegu.pdfIn PDF document text
    • http://vinaktv.com/storage/ckfinder/files/82377866973.pdfIn PDF document text
    • http://sparan-art.ru/ckfinder/userfiles/files/97845056770.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/dapoxag.pdfIn PDF document text
    • https://www.opsclown.it/ckfinder/userfiles/files/jekepu.pdfIn PDF document text
    • http://clevio.biz/fckUpload/file/25375575035.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/45634691548.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/xaxunomuxapipukupex.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/lakezubiwosobufo.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1612eab0dc6a0d---37134080499.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/minodasebes.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140711329a52---munewezinadinibopale.pdfIn PDF document text
    • http://srcchaika.ru/files/uploads/files/9731463087.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16130704e39830---wimatodarukuvemosi.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/72902822418.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/mixewuvamukemewubuja.pdfIn PDF document text
    • http://888spirits.com/userfiles/file/89939890145.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/202197184635928.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/wevelolodafig.pdfIn PDF document text
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/27206794232.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=best+app+for+downloading+books+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_off0000ca45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA45 11044 bytes
SHA-256: d7ecac0c46562867d2f7b8f338b537283ca9992b42b769dffcfec0dc7dd5172e
font_01_sfnt_off0000e3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C0 17832 bytes
SHA-256: b8df90e56b37c736217210a8fba21c41880be2909fff3670b4bc62943b7b0475
font_02_sfnt_off00011198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11198 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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