Malicious PDF — malware analysis report

Static analysis result for SHA-256 d52bc80926021f16…

MALICIOUS

PDF

71.9 KB Created: 2021-09-26 18:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a02c0b3ccc64bf6a4bfe3dc1e767cfad SHA-1: 2e45f818a0aa6491def0a09618370b9b2b95aaf0 SHA-256: d52bc80926021f1679897099f83301014ba3abda1cfcab612f3534de6f5238f5
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded links, many pointing to unknown domains, consistent with a link farm used for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • 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 http://dansensvenner.dk/imagesfile///13412422544.pdf In PDF document text
    • http://katela.net/userData/board/file/beboruvinijogisolabagu.pdfIn PDF document text
    • https://rafaellopezehijo.com/upload/files/merinezojotawusezesuwuro.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/53027691501.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/91437449412.pdfIn PDF document text
    • http://superazs.ru/images/news/file/zajuxidenuluzafoxog.pdfIn PDF document text
    • http://knipia.com/userfiles/file/21044483243.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5a6aa18f2---65979498047.pdfIn PDF document text
    • http://liceoadultos.juniorcollege.cl/userfiles/files/64752366326.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/tirizudojapudojesukus.pdfIn PDF document text
    • https://cartolmania.it/file/39634196057.pdfIn PDF document text
    • http://doanhnhangiaophanvinh.com/images/files/24348894851.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/49714050235.pdfIn PDF document text
    • https://esz.jp/img/editor/files/makurelubi.pdfIn PDF document text
    • http://farmina.ru/uploads/files/gitisirakemik.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/57331204331.pdfIn PDF document text
    • https://artbynela.com/uploads/file/poraxagijopivamuzaf.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/3105997073.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/22767051943.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/damamazomoxogomadiwu.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/rizapowivaledinapenekal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=boot+android+in+recovery+modePDF 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_off0000b445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB445 18024 bytes
SHA-256: 71dd194ab7aea4a3726279e7980322a2b7e14e7a66891289234851e5f9ec011b
font_01_sfnt_off0000e27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27F 10548 bytes
SHA-256: 730660ee604d56b573cb0fa0b71e82f43f44d41a969913559d735380074b7b48
font_02_sfnt_off0000fa97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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