Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b42b6b0d77a73f8…

MALICIOUS

PDF

48.1 KB Created: 2021-03-09 02:52:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 146848ea9877cc233fdfe8a857c31ee4 SHA-1: 806ff5bd36bc489988937e88b5b23ae250e73a09 SHA-256: 1b42b6b0d77a73f880132237f22d8b20f6d54462a6d6dcc97d3cea2360c1fd4c
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many hosted on disposable domains and link farms, suggesting a tactic to manipulate search engine results or redirect users to malicious sites. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of external URIs and a link farm indicates an attempt to drive traffic to potentially malicious or ad-revenue-generating websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9334

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://baarspo.ru/wix?keyword=velocidad+del+sonido+km%252Fh PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447878/normal_600691dc0090f.pdfIn PDF document text
    • https://vizegibog.weebly.com/uploads/1/3/4/4/134458583/lewatupir-kisawirekep-bopibe.pdfIn PDF document text
    • http://afracheat2.xyz/schaums_outline_of_differential_equations_3rd_edition_solutions6wivn.pdfIn PDF document text
    • https://fikuzafunowu.weebly.com/uploads/1/3/1/8/131857523/rofemizevumovut.pdfIn PDF document text
    • https://webexopugidoxog.weebly.com/uploads/1/3/4/3/134319438/9450399.pdfIn PDF document text
    • https://ribufesoguvas.weebly.com/uploads/1/3/4/6/134680119/204a88066670ed9.pdfIn PDF document text
    • https://silatasetexa.weebly.com/uploads/1/3/1/6/131637876/9002108.pdfIn PDF document text
    • https://nelunozulugekis.weebly.com/uploads/1/3/0/7/130739970/nunotori.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446924/normal_5fe3ae2f3bd43.pdfIn PDF document text
    • https://pizipeko.weebly.com/uploads/1/3/4/6/134611096/bakitazije_jiroveka.pdfIn PDF document text
    • https://viwoxinuzozaxa.weebly.com/uploads/1/3/1/6/131636825/bexidetila_faxijasutak_bazel.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/what_are_the_different_roles_in_scrum_process.pdfIn PDF document text
    • http://activa-fb.com/adobe_illustrator_tutorials_in_tamiltqyt4.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/triangles_3_exterior_angles_worksheet_answer_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453103/normal_60301310a44eb.pdfIn PDF document text
    • http://nifusotajezunur.atwebpages.com/nespresso_delonghi_descaling_instructions.pdfIn PDF document text
    • http://lawewil.atwebpages.com/netgear_wgr614_v6_factory_reset.pdfIn PDF document text
    • http://zaduzos.myartsonline.com/ancient_greece_olympic_games_events.pdfIn PDF document text

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