Malicious PDF — malware analysis report

Static analysis result for SHA-256 41a0a67a45dcef76…

MALICIOUS

PDF

74.1 KB Created: 2021-03-25 17:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0ef7f40e5d49f778caedd0f9e80b0f34 SHA-1: 4880ab69fbb4d47acf5383be2eb7b6eb7d2774a0 SHA-256: 41a0a67a45dcef76bc674f555143f2d4d564b85fbac2a1df1b243b4b97e9e797
134 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and a heuristic firing for a link farm. The presence of a 'download button' lure, combined with ML and ClamAV detections, strongly suggests a phishing or malware distribution attempt. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/123?utm_term=fender+acoustasonic+junior+amp+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407749/normal_5fe99551ce28a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_6048f7db52cac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376879/normal_5ffb038a4c9f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456667/normal_602aa509d9440.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424689/normal_5ff690ae8036d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450870/normal_5fefbb39afe82.pdfIn PDF document text
    • http://tilikef.mygamesonline.org/morfologi_bayam_duri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502511/normal_6046065181b7f.pdfIn PDF document text
    • http://kekijojovif.sportsontheweb.net/36447239378.pdfIn PDF document text
    • http://degitowexara.iblogger.org/lexicon_ethics_book_in_english_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_42f271206b7f4d7e9c56bbf37823d576.pdf?index=trueIn PDF document text
    • http://mutoris.rf.gd/mikedej.pdfIn PDF document text
    • http://venenexen.rf.gd/utero_atonico.pdfIn PDF document text
    • http://movedubeliw.epizy.com/terovogedidix.pdfIn PDF document text
    • http://netomadutimafe.onlinewebshop.net/91066284805.pdfIn PDF document text
    • http://xakazasaravi.onlinewebshop.net/11638652197.pdfIn PDF document text
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_6a1f82f4eded446cb943adb568978f0e.pdf?index=trueIn PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_875f2452c070422eba07e3b69865f64e.pdf?index=trueIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_72a7f9cddd8a423896316cd51f406c88.pdf?index=trueIn PDF document text
    • http://lidesesepaz.rf.gd/bollywood_movie_full_hd_website.pdfIn PDF document text
    • http://dalotatafajadad.epizy.com/beyond_compare.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52D 5248 bytes
SHA-256: d36ceed7e79fba1d82a2f24715e55800387f7ab9fced62ebc8ca0e3739226548
font_01_sfnt_off0000f6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F1 10456 bytes
SHA-256: b309b0363992ecc27b56df766321e4da31b5a8fa0e0743b1e5514195a1c61a46

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