Malicious PDF — malware analysis report

Static analysis result for SHA-256 777dc7c316511f79…

MALICIOUS

PDF

41.6 KB Created: 2021-04-02 03:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8b1d56f5b3eccfd67c65b6d1b8d8d53f SHA-1: 346aafa696992f4d423b2d4d084754da0711b407 SHA-256: 777dc7c316511f7961911612dddf3dd1fea5f8df93680da75d3c1394a4439650
144 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8890

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://seumenha.ru/aws?utm_term=social+behavior+mapping+template PDF link annotation
    • http://mir23.xyz/skyrim_how_to_install_mods_without_steamjy5cm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401540/normal_6056134431bff.pdfIn PDF document text
    • http://nidewopovuwubo.mypressonline.com/18001271730.pdfIn PDF document text
    • http://blog-millionaire.buzz/sijoxokojupiliwaxabah6im.pdfIn PDF document text
    • http://pifemukopisare.sportsontheweb.net/4279290540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486521/normal_602a178e56814.pdfIn PDF document text
    • http://instapriz365.online/78349368184mzl2n.pdfIn PDF document text
    • http://lightly.store/96312701495rdwzv.pdfIn PDF document text
    • http://itasummer.fun/turujojem408z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446035/normal_60443e5a84fc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480876/normal_60105646c3638.pdfIn PDF document text
    • http://luxuwum.mypressonline.com/8403533363.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392452/normal_5fffdc449c669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fea40d5f-b8a4-43cc-a2a5-12777a78cd76/little_red_hen_story.pdfIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_a45b3e435f65440398ea00ef41610ef0.pdf?index=trueIn PDF document text
    • https://278d3eb0-aa6e-4faa-826d-cdbdc5132fb7.filesusr.com/ugd/c34eac_066b8eca29ed45b6903ae7a612ac487a.pdf?index=trueIn PDF document text
    • http://sifebitufol.onlinewebshop.net/26403474003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76373bda-f638-4f3b-aa8a-da1d8bfeff00/how_to_tell_if_baby_is_sleeping_too_much_during_the_day.pdfIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_245be630c64e4a519789a42083cbed62.pdf?index=trueIn PDF document text
    • https://cf62593c-3f62-494e-9ef9-3c2a63ead7d7.filesusr.com/ugd/93dae2_f3b9cfbbd59e4ed2a5ed47ff79c30659.pdf?index=trueIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_0c3218863e69478aba37e3d1526f5a9d.pdf?index=trueIn PDF document text

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