Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b57cd6328fb1a8f…

MALICIOUS

PDF

64.0 KB Created: 2021-03-09 00:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7441394388db131f0599cc29b8fd9272 SHA-1: 4238af2268113f3d5dfd51e639181e65da414d8d SHA-256: 0b57cd6328fb1a8f6ff06048103c381d065202c2a6f18d72e0140ddc6652bba0
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9565

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://dugedepap.ru/award?keyword=bods+architecture+pdf PDF link annotation
    • http://gerujab.22web.org/3_metros_sobre_el_cielo_reparto.pdfIn PDF document text
    • http://helplnstagramoffice.com/x_core_galactic_plague_apk3bcho.pdfIn PDF document text
    • http://wildber.store/king_henry_died_drinking_chocolate_milk_videoh7mgl.pdfIn PDF document text
    • http://ledy66.net/resume_menon_platono52tq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_e7715a28296f4f538dd818c135c02e40.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d707f167-e1d7-4c1e-ab8d-5749a8311c10/14593728496.pdfIn PDF document text
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_03e46dbe0e0c479a8299e04ab9c859ea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a4865b-d98b-41a9-8c05-fd00b6bd6b19/dark_souls_1_4_kings_location.pdfIn PDF document text
    • http://mavowidigusuj.rf.gd/how_fast_is_eminems_fastest_rap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7079746b-4732-4f1e-8119-52d2c3a2eb5a/how_to_connect_dvd_player_to_smart_tv_with_cable_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5735d958-8132-4f2b-b45c-e424ea91e138/singer_tiny_serger_model_ts380a_manual.pdfIn PDF document text
    • http://vomonulesew.rf.gd/donixopase.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/plugin_add_ons_open_video_chrome.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/tidofelonojazufase.pdfIn PDF document text
    • https://e20d271a-53e3-41f9-9180-d6cd5f9fd148.filesusr.com/ugd/6cfc61_9d0cec9075934ec48aeb6f67b47defa8.pdf?index=trueIn PDF document text
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_814d113f9c074abb80ebeeb22baf4ef8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/vegamebulamixomal.pdfIn PDF document text
    • https://2a1457bb-a4d2-449b-8914-d784a503a6da.filesusr.com/ugd/c0fca2_1917ec794f0840db83895c78f1b6a116.pdf?index=trueIn PDF document text
    • http://diwejijozijigez.rf.gd/zojebadapimuvote.pdfIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_81b0eac96037488fad2761b5eeae9838.pdf?index=trueIn PDF document text
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_721ddfa5a6ab44d4844dd11934cf5944.pdf?index=trueIn PDF document text
    • https://28481333-1ef2-46fb-8ebf-d56c3f24acbc.filesusr.com/ugd/314c35_c8bef492d82c40c286024badf69cfc1e.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A4 5260 bytes
SHA-256: 4da4c6a573baf15ec8f21df0d07a0787dbb6ab25fe6fd3a5f2c984e0ff76cb24

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