Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b3aab1686278e3a…

MALICIOUS

PDF

74.6 KB Created: 2021-05-09 18:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3473faf06a13638a0a19091697b76026 SHA-1: 731be37878481d1f0a3f5b56c80583efc79fe5bc SHA-256: 6b3aab1686278e3ae674c5413e4f17168c5d7cbcc5b37329ab9f673a8ad12e41
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely designed to redirect users to malicious websites for further exploitation. The presence of multiple external URIs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=grohe+ladylux+plus+kitchen+faucet+parts
    • http://geloritiveda.mygamesonline.org/sleeping_beauty_piano_sheet_music.pdf
    • https://cdn.sqhk.co/dejuxafe/NqiissI/dofofezib.pdf
    • http://kejoxemubogese.mywebcommunity.org/45222843479.pdf
    • https://cdn.sqhk.co/gejikofoxaf/ij9ahce/kimubiwudiwopuvuwomudizaf.pdf
    • http://dufifudusimube.mygamesonline.org/dimmock_virology_download.pdf
    • https://cdn.sqhk.co/sawijewabob/ehbgcgc/80381557846.pdf
    • https://cdn.sqhk.co/galemojubemo/hggjEM3/truck_driver_punjabi_songs_mp3_free_download.pdf
    • https://cdn.sqhk.co/zelosoza/igihMjc/58880086081.pdf
    • http://pasikufopubiwo.mypressonline.com/gukefol.pdf
    • https://cdn.sqhk.co/sileluzorupo/ljb3ZdA/fastest_woodcutting_guide_rs3.pdf
    • https://cdn.sqhk.co/gobajejuz/giid4gj/jilikewisabe.pdf
    • http://vadosaj.getenjoyment.net/pebupagesorenu.pdf
    • https://cdn.sqhk.co/tavevalurov/eGWGXve/best_auto_racing_camera.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_c28e3e108a8b43958039bd9bef3ac8a0.pdf?index=true
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_70f1634579e84e379f9f8f0c409d3cf3.pdf?index=true
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_e9bb9de80f564e8da5903533d2ec5f41.pdf?index=true
    • http://rixigor.onlinewebshop.net/benign_positional_vertigo_patient_handout.pdf
    • https://uploads.strikinglycdn.com/files/627aabe6-0202-4b3f-aeb3-dab457e46686/mercruiser_5.0_horsepower_rating.pdf
    • https://uploads.strikinglycdn.com/files/fd2703aa-d197-405e-834c-5a3aaf946905/86384629266.pdf
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_0b43962e7296492397eb747d5f62e793.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e537.bin
852e9e996f1c2a1dcdda55d673c8e89beff83eff2cccf5cf27c69c572f453b76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE537 5508 bytes
font_01_sfnt_off0000f7fe.bin
168e105d63a26ff4472c4abe3f46cb7a4a2f07aa1afdd7160dc375d2f611b348		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FE 10924 bytes

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