Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5fa1d543b85a624…

MALICIOUS

PDF

80.4 KB Created: 2021-09-18 11:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f3064d03af148108d2deea2af892414d SHA-1: ce5d6d5e24d97f24e2b1415604524cb3b0a0e83f SHA-256: c5fa1d543b85a624aa698f8761d8d5b4a6615ce5aeb6036e95f4213c2115282c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The PDF contains numerous embedded links, many pointing to potentially malicious domains, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the presence of many external URIs and the overall detection profile indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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.
  • 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://amoslodge10.org/ckfinder/userfiles/files/pidajetujobejavivafadura.pdf In PDF document text
    • http://rkmaster.ru/uploads/files/56790026364.pdfIn PDF document text
    • https://lotteppta.net/beta/assets/file/77195169240.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161450d1499652---fuvilumuwir.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/2jk2uodhftkvi9r13p5f6mo9uu/58074624086.pdfIn PDF document text
    • https://wojczak.pl/userfiles/file/65849352915.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/nezuriresefes.pdfIn PDF document text
    • http://urotunisia.com/uploads/FCK_files/file/bofesajofibodugepet.pdfIn PDF document text
    • http://builderall.info/userfiles/file/zepusigavasudav.pdfIn PDF document text
    • http://abnig.friendship-match.com/upload/files/5659737536.pdfIn PDF document text
    • http://hc6999.com/userfiles/files/gakozubawalenopamed.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/61446788639.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/tuxavufew.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/vopuximudazopowa.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/43590205216.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/83509603186.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/11719560349.pdfIn PDF document text
    • http://napiarsaigh.com/images/mewudu.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/54695668520.pdfIn PDF document text
    • http://hoya-system.com/uploads/files/202109130714545747.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/tekofupidedejifutumiv.pdfIn PDF document text
    • https://redac.ch/upload/52051852805.pdfIn PDF document text
    • http://webbuilders.com/files/file/libapumevuf.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/bedetuzoseme.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/dakaposowijavufawavodemi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=alita+battle+angel+full+movie+downloadPDF 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_off0000d431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD431 17928 bytes
SHA-256: 44274e67282cac01785801314e1faab4a6726eaf98ad265c2c04dea21066d647
font_01_sfnt_off000102d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE9 10804 bytes
SHA-256: 2e504ea80f77c813771b66ab3bc55b45e4064c8468462a00b4e85ce9879afcca