Malicious PDF — malware analysis report

Static analysis result for SHA-256 62246ffa50e76528…

MALICIOUS

PDF

84.9 KB Created: 2021-05-19 04:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2c2b30c51a752ecc6b9b2dbacc875e39 SHA-1: 3a6a76a14cec062e1737f4ee123a0d54c97abb1b SHA-256: 62246ffa50e76528674662c6460ac20017fe9012998a8adfd1bb34544c2e4872
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, and heuristics indicate it's a browser extension installation lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the nature of the lure and the malicious URL point towards a common phishing or malware distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://crophysi.ru/strik?utm_term=can+you+mine+bitcoin+on+mac In PDF document text
    • https://static.s123-cdn-static.com/uploads/4402478/normal_5feb37284d00a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465564/normal_6032e2525f3ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408177/normal_6023642fe7d61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/google_chrome_update_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e584051-9f18-401a-b5de-fbe558d5d811/central_machinery_8_in._5_speed_bench_drill_press_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feb5ad06-66a5-4fd7-9b57-5abf977be63f/bhagavad_gita_16_chapter_in_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/buxenoresedusibigoz.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/como_atualizar_o_whatsapp_2019_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/kubesizasubafiponegepi.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/remetedofiraponogolat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da2baefc-682f-4862-b2b7-518c7537277f/what_do_i_need_to_change_my_address_on_my_license.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/35272664221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e65907c5-2456-4f59-b9c5-759b2f83fe40/star_trek_voyager_character_one.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e76ffc0b-82b0-4f49-9741-d4a196b3752d/how_much_a_script_writer_earn_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b79c217-4867-4181-9574-50e8e79d7b56/atem_tv_studio_hd_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d77ce8-5842-49d5-9a5e-ea0fc234a5c1/numotusuvefelekolazifina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f99598d-0267-464c-b810-fc6aae2da463/asus_m4a78t-e_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/401d5389-2f61-4456-9145-fce607c3b36c/navofipirodelasal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c32be5de-e54d-4c76-93b7-e1bf5eebcfc3/how_to_get_a_career_in_software_development.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/android_apps_on_pc_without_emulator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9b63d36-864d-4796-9b30-b7d3d4a54c6d/32254324952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb039004-0608-4b96-8949-79462a7be868/75990436063.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001100c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100C 4788 bytes
SHA-256: ed1d57365a7296702cba8bc2524b24942b232b7028c85766d877115061afa2de
font_01_sfnt_off0001204b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1204B 11152 bytes
SHA-256: c9fe1080d3eb1c89a618fcde6248d8b3236c665bd35a2c5bd4ea190ab4b8770f