Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f45316657ec056…

MALICIOUS

PDF

86.3 KB Created: 2021-09-01 04:37:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0afe4cc6ad28ceba93ec639af012a6f8 SHA-1: 4d15842aae342e61afd4f3177edc5e17842e095f SHA-256: c4f45316657ec0562e8461bf611182c83bb018afa39d395663332492bf4a1c0f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, characteristic of a link farm designed to redirect users. The primary function appears to be directing users to external malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://savages.lu/imagesRTE/files/nazuravu.pdf In PDF document text
    • http://www.toeterloeh44.de/files/96742603402.pdfIn PDF document text
    • http://dogoxuavanay.vn/uploads/files/kixike.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c7bb0f820a1---64814860355.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-8-24/20210824221811203108.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/277027649609c62ae9de83.pdfIn PDF document text
    • http://cudicio.it/images/file/97232345728.pdfIn PDF document text
    • http://hsiwww.com/image/files/20210623_154952.pdfIn PDF document text
    • http://remobudostol.pl/pliki/78440433559.pdfIn PDF document text
    • http://yejida.com/userfiles/file/dapaviguwod.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/7e0178a5f6cd199840c3dd5c01204259/69231001470.pdfIn PDF document text
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/bumabidol.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/53975261931.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/besagizig.pdfIn PDF document text
    • http://vssteel1999.com/ckeditor/userfiles/files/72693657726.pdfIn PDF document text
    • http://casaalu.com/luutru/files/26914829127.pdfIn PDF document text
    • http://chikatere.com/Upload/files/lesetinuxenunonezaporowib.pdfIn PDF document text
    • https://www.crqp.ch/ck/ckfinder/userfiles/files/96176640283.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b086827236---giruduxiperubesegilezozo.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/zewonelusodaf.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/jorerumotizerotafadudi.pdfIn PDF document text
    • https://stopserv.ru/files/file/jazazaru.pdfIn PDF document text
    • http://businessvaluationapp.com/fck_files/file/72311901902.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/nukewulujurigasurux.pdfIn PDF document text
    • https://tch.lu/files/files/12897365301.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=spencer+list+icarlyPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4C 10436 bytes
SHA-256: 052c7bd3c26ec2d8fd1fea8b044680228d373e6c013e4159164c6f6051e69735
font_01_sfnt_off00010517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10517 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D29 18008 bytes
SHA-256: 2786107f948d17f014562b8b879a9bfbaf9ad646647c1ff6f9e1e173510533ab

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