Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b4dc78fa69fa04c…

MALICIOUS

PDF

72.5 KB Created: 2021-06-07 23:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0a2b4f645f05ca7a5aaf2f42f59d94f8 SHA-1: e8e1d6ce9fcbf983eb5556e9cfff8392c226c16a SHA-256: 3b4dc78fa69fa04cc71083a2843bca63b5057885d5b3ba89952f44f0189298ba
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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
  • 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
  • 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://archism.ru/pbw?utm_term=enlace+quimico+covalente+coordinado PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405641/normal_602872250b23d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402481/normal_60150d4d42034.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427499/normal_602288b588401.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480743/normal_600519ec3875f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485435/normal_5ffc01c53eb17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417645/normal_603b61c0814b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416319/normal_60418f70959ee.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/940943c3-1162-4c58-b69a-c5336dc2eff2/twilight_saga_new_moon_free_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3059add6-9302-471c-b664-49ed96a2cffd/history_of_the_world_book_series.pdfIn PDF document text
    • http://xobapotowi.pbworks.com/w/file/fetch/144699129/gewifotirejutofef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5214a24a-7329-4218-bfc1-77e104c424dd/71087893850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c61bc3c-2c8d-490e-bbc1-019f6ae82fe0/creative_sound_blaster_x-fi_hd_linux_driver.pdfIn PDF document text
    • http://wasazejis.pbworks.com/w/file/fetch/144803496/download_game_bus_simulator_indonesia_mod_android.pdfIn PDF document text
    • http://nekimijazom.pbworks.com/w/file/fetch/144669333/pekomosokotufud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f319b52-ae69-49cc-a482-b86bceb0b60c/java_8_update_92_jdk_download_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16fee48a-e3e2-4232-9742-b9ab23694799/1237337669.pdfIn PDF document text
    • http://kelivesas.pbworks.com/f/80143431672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e79eef77-9605-45d1-9d70-be43fbe00ad3/themes_of_the_duchess_of_malfi.pdfIn PDF document text
    • http://fisojun.pbworks.com/w/file/fetch/144758262/89212582092.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DC 1664 bytes
SHA-256: aa398d468fb53855c1519c7318b4596fae9d90a6a24684ede1401611f4dbef69
font_01_sfnt_off0000ded1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED1 5052 bytes
SHA-256: 8f56a3774e8ea002919004f745643c5f1648752421e13d153387d2c98ca2ab4f
font_02_sfnt_off0000efed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFED 11124 bytes
SHA-256: ae92c92f83ff7250fc9523bdcffc72453cb86429d414eb38de3107b0ba7d7c5a

Open this report in the interactive analyzer, or submit your own file for analysis.