Malicious PDF — malware analysis report

Static analysis result for SHA-256 f16de3c8e20d89f1…

MALICIOUS

PDF

76.3 KB Created: 2021-03-01 18:39:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6e376b3b100aed331f9ad75a3cc5d78f SHA-1: 25adc51c523fd5a9414047fba0f467318465e8d6 SHA-256: f16de3c8e20d89f162b7d7d5e9d633aa0e5ec4959e61012afc8c9f0d49cc5b92
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to contain search query-like text, suggesting a lure to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9620

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://yafferge.ru/award?keyword=where+is+sim+card+on+motorola+flip+phone In PDF document text
    • https://static.s123-cdn-static.com/uploads/4389106/normal_5fef65998aa40.pdfIn PDF document text
    • http://ionatr.fun/lunubawazojamavamukaliriq1pma.pdfIn PDF document text
    • http://dombitarf.ru/flysky_fs-i6_ia6b28qzd.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/6geghhe/jeveduvudofed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481064/normal_602df7973f4a9.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/PFeidgg/wifi_driver_intel_windows_10.pdfIn PDF document text
    • http://tehnotop.site/bizaxenalusowefuwovo46a5c.pdfIn PDF document text
    • http://likelid.xyz/bapipimipubunijul69.pdfIn PDF document text
    • https://cdn.sqhk.co/bexuxoxabim/mvig8gj/bogisuwaviguwonugi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488809/normal_601c6425540ec.pdfIn PDF document text
    • http://matroskin.space/7339297478223gei.pdfIn PDF document text
    • https://vadiduriku.weebly.com/uploads/1/3/4/4/134445950/1286288.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/jhO3tjh/download_gogo_live_mod_apk_iphone.pdfIn PDF document text
    • https://papafamibupa.weebly.com/uploads/1/3/0/7/130775965/8661f7780e9ccc.pdfIn PDF document text
    • http://ighelpcenter.xyz/xamarin_forms_android_navigation_back_button_event5mn63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480142/normal_5fdd59f3c94cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lajofekozorofa.rf.gd/rutuzaxodojujojora.pdfIn PDF document text
    • http://rabuxudaxubaso.epizy.com/nevememuzidovazo.pdfIn PDF document text
    • http://jaxages.epizy.com/ziturivaw.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF863 5408 bytes
SHA-256: f149881722b3d6f2a1761a127e8fe27672c750dcdcb14d6f8dbf3270afd2418f
font_01_sfnt_off00010aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAE 10276 bytes
SHA-256: 1aff11e365a5fe0dfd6ee8736db36d86ddf3c0fbac9ee041a39f7928e98701e0

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