Malicious PDF — malware analysis report

Static analysis result for SHA-256 1813d9441f8a5ebb…

MALICIOUS

PDF

76.3 KB Created: 2021-03-03 01:37:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: d55ee96a26899f6921a27e3eee0a2585 SHA-1: f1b6ddf8a236a273ea36586c82d0d3b50375b94f SHA-256: 1813d9441f8a5ebbcaa606fdf7734fd7066789fa0f2b5fb4e9ae3c21ba1e09cc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, with one pointing to 'xajibur.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host many links on disposable domains, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9555

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
  • 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://xajibur.ru/award?keyword=will+xbox+series+x+support+4k+120hz PDF link annotation
    • http://veselutut.mywebcommunity.org/what_is_the_difference_between_hemi_sync_and_holosync.pdfIn PDF document text
    • https://xufetujada.weebly.com/uploads/1/3/4/7/134745175/fdcb4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384649/normal_6000b45fae4e9.pdfIn PDF document text
    • http://lightsex.ru/singer_touch_and_sew_zig_zag_model_750wo3vm.pdfIn PDF document text
    • http://keto-s1.com/best_android_weather_app_uk_2019tqr8s.pdfIn PDF document text
    • https://peketavapi.weebly.com/uploads/1/3/4/3/134331612/7262333.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_603b4a117034b.pdfIn PDF document text
    • http://stavki.link/favuxalekumumuzitevabini0fqdh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377662/normal_5ff27b7459b48.pdfIn PDF document text
    • https://tamilazubi.weebly.com/uploads/1/3/4/6/134604156/tozulepo_gotolewafovasu_suzofamitexu.pdfIn PDF document text
    • https://jarofuzaduse.weebly.com/uploads/1/3/4/5/134502270/dotulapasul.pdfIn PDF document text
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/42efb3df793.pdfIn PDF document text
    • http://buytoday.cc/how_much_does_it_cost_to_have_a_car_alarm_installedm4djs.pdfIn PDF document text
    • https://vixawesomuwevu.weebly.com/uploads/1/3/5/3/135387162/175351.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/watozixamidodowixexori.pdfIn PDF document text
    • https://luwupedo.weebly.com/uploads/1/3/1/3/131383743/losif-vibewojopomod.pdfIn PDF document text
    • http://hayatevesigar.online/88324138864mtu5z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pikaderobiw.atwebpages.com/house_of_leaves_books_a_million.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/line_symmetry_worksheet_gcse.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/utorrent_free_for_windows_10_latest.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_off0000f88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88F 5444 bytes
SHA-256: b76565f0742735973b989e7acf35009a86d33c57c0066de99dbd4e9713967845
font_01_sfnt_off00010b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B33 11060 bytes
SHA-256: ce6c3133ff54fb0db5a3dae1967f62762caf0355c9729905a2006c467ba3fdb3

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