Malicious PDF — malware analysis report

Static analysis result for SHA-256 499b775b647546bd…

MALICIOUS

PDF

50.6 KB Created: 2021-01-24 12:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fa14e5ef785577ba3d88bd9b7e70c8f SHA-1: cf11326d8163ed2fc52778030c9171a45b04b6e0 SHA-256: 499b775b647546bdb474158c6ed66b20df2bd915b69c24bf249dcd9eb73d4a4e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded URLs, with one specifically pointing to a lure about a 'speaker volume booster for android'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards malicious intent, likely involving redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7384

Heuristics 4

  • 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
  • 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://trafficel.ru/aws?utm_term=best+speaker+volume+booster+for+android
    • https://cdn-cms.f-static.net/uploads/4393034/normal_600d1b97effac.pdf
    • https://nitaluba.weebly.com/uploads/1/3/4/3/134348735/12467557.pdf
    • https://cdn-cms.f-static.net/uploads/4485305/normal_5fd6df58d1f22.pdf
    • https://static.s123-cdn-static.com/uploads/4485176/normal_5ffc31054fe49.pdf
    • https://static.s123-cdn-static.com/uploads/4481831/normal_5fcf8cdd44941.pdf
    • https://cdn-cms.f-static.net/uploads/4501989/normal_5fd71eb371124.pdf
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/gutalomopeni-novexifiwu-bilejoko.pdf
    • https://cdn-cms.f-static.net/uploads/4473445/normal_5fe9f1ac4283c.pdf
    • https://cdn-cms.f-static.net/uploads/4454184/normal_600cf42fa374d.pdf
    • https://woxazalaxit.weebly.com/uploads/1/3/4/2/134235403/mixomikebixo.pdf
    • http://tipaxoj.66ghz.com/difunifizajinuje.pdf
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/jotojetidebabejike.pdf
    • http://vatapusaf.rf.gd/batman_arkham_origins_apk_revdl.pdf
    • http://fasevebozumip.rf.gd/mail_online_app_for_android.pdf
    • http://jexusapije.epizy.com/vufunuxogowebe.pdf
    • https://s3.amazonaws.com/fadadedezeker/bncc_2018_baixar.pdf
    • http://xejonitofopim.epizy.com/iift_kakinada_placement_report.pdf
    • https://s3.amazonaws.com/nilititonawafim/new_bollywood_movie_2018_free_mp4.pdf
    • http://kupikobu.epizy.com/shin_chan_video_tamil_movie.pdf
    • https://s3.amazonaws.com/zifozujiwi/video_instagram_iphone.pdf

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