Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc248fa34ca9972e…

MALICIOUS

PDF

80.3 KB Created: 2021-09-19 13:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 67d62f268a279f1493dc3900104569fd SHA-1: fd275f1693dbece5ac01fabe4b82dcc203d66af7 SHA-256: dc248fa34ca9972ed07b960df97395538c14814c2be1bb89fc7fbc9268eb18fe
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external sites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common PDF-based malware delivery techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://catamma.ru/uplcv?utm_term=driger+qr+code PDF link annotation
    • http://boxshop.mn/userfiles/files/11746261538.pdfIn PDF document text
    • http://clickvay.com/upload/files/97861749312.pdfIn PDF document text
    • https://cantellodetersiviprofessionali.it/uploads/file/30428941142.pdfIn PDF document text
    • https://xehowo24h.com/images/ckeditor/files/kogorufagetavugegibe.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/68516851445.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161443a8fe066d---fugiwefanamup.pdfIn PDF document text
    • http://whatdwellswithin.com/file/sodozekurarelifugoxos.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/xiwezavipitirap.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1613aecce880c3---64323885420.pdfIn PDF document text
    • http://an-ocn.ru/ckfinder/userfiles/files/wufosisu.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/b96e0fd33f7e6e60b98ef6e830330ec0/25660953646.pdfIn PDF document text
    • http://maturitni-ples.eu/UserFiles/File/84535640734.pdfIn PDF document text
    • http://teplospectr.ru/images/files/34325805746.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe18b8b210---24644421502.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/sowevopilizefuzenu.pdfIn PDF document text
    • https://lecourbe.dk/userfiles/file/rabibuzati.pdfIn PDF document text
    • https://ashasuchikala.com/ckfinder/userfiles/files/popowekabugemosazeloxa.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5c794f367---91318539953.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/68343397390.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/161463d778ace5---77249816727.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/molulirufipitodewiwut.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/31533668591.pdfIn PDF document text
    • http://owop.challengersports.com/ckfinder/userfiles/files/namakevotuwokif.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/puzolugamivuwot.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_off0000d95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95F 10112 bytes
SHA-256: db06643980db74e6a12d9a6a0646da60200732fd203c5999702ec81cd29b41e4
font_01_sfnt_off0000ef6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6C 17112 bytes
SHA-256: 5ac5545136001d9d57cf971e6e85183bea3b9a357def9427c5093d71e63b4d73
font_02_sfnt_off00011bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.