Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a661a83b3c0122f…

MALICIOUS

PDF

49.6 KB Created: 2021-03-07 10:21:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16716cd04b01a5459320c94c1bf605f9 SHA-1: eee74f70259758da90468be93cee7a08b335bf1a SHA-256: 9a661a83b3c0122f2fa84611397a8a0d48977e312912b916fde62d43ddbebcbb
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a phishing lure. It contains a single image and minimal text, typical of a screenshot designed to conceal clickable links. The embedded URL `https://xajibur.ru/strik?utm_term=how+to+restore+windows+7+from+command+prompt` suggests a lure related to system recovery, likely leading to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7360

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 49 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://xajibur.ru/strik?utm_term=how+to+restore+windows+7+from+command+prompt
    • http://misamal.22web.org/75899672031.pdf
    • http://gonzo-3d.com/soleus_ky_80_8_000_btu_portable_air_conditioner_dehumidifier_and_fant29l5.pdf
    • http://pristav.pro/kukidenokarulamutzryxr.pdf
    • http://pihodze.com/xujekisibabisevizujotofubct5vu.pdf
    • http://nuvotana.22web.org/34072761428.pdf
    • http://rebokomixuxoj.epizy.com/76545022090.pdf
    • http://wusugan.rf.gd/55306707199.pdf
    • http://moferamobonar.epizy.com/diwubopokufeputikive.pdf
    • https://uploads.strikinglycdn.com/files/1f868c86-f892-4fee-b61b-51c7439c9111/where_can_i_download_microsoft_access_for_free.pdf
    • http://gojexevetefe.epizy.com/what_does_the_united_states_constitution_say_about_immigration.pdf
    • https://s3.amazonaws.com/fopalew/what_are_the_roles_and_responsibilities_of_a_barista.pdf
    • https://uploads.strikinglycdn.com/files/33abbae3-d6ad-46f9-a707-a884bd431041/how_to_edit_grub.conf_in_centos.pdf
    • https://uploads.strikinglycdn.com/files/93cb5e7d-337e-4865-85c2-cecdb15b3650/fukemafibimatigodi.pdf
    • http://fuliluxu.rf.gd/20693567.pdf
    • https://s3.amazonaws.com/pizivurapab/70228235456.pdf
    • https://uploads.strikinglycdn.com/files/f8f8c4a4-f51e-4f37-88a0-7d44dcf4636c/environmental_impact_assessment_process_slideshare.pdf
    • http://bepibuxel.epizy.com/house_layout_design_software_free.pdf

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