Malicious PDF — malware analysis report

Static analysis result for SHA-256 23666559abd125d8…

MALICIOUS

PDF

125.1 KB Created: 2021-04-03 02:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f06aa933eb0efff02625c5a63f3dcea5 SHA-1: 0154f6f23f1dd5231ff255b863249b4c0ba09b46 SHA-256: 23666559abd125d84f699c96160565cc661349bc1840440575c6dc04bcb2cbc8
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 0.9998

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://jumiwimov.ru/strik?utm_term=ipod+shuffle+3rd+generation+user+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467036/normal_602c4e6dc832c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449395/normal_5ff1642d1fcd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460463/normal_6047afcc174f6.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/back_pain_exercises_arthritis_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386091/normal_60386b986448b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444644/normal_605fb26317464.pdfIn PDF document text
    • http://christinaanddavid2019.com/19320485164o31s6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505820/normal_6033f37547f65.pdfIn PDF document text
    • http://rewita.fun/57758533737nmmev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486997/normal_6027846408eb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486775/normal_5fc829e0a94bc.pdfIn PDF document text
    • http://kivolugog.mypressonline.com/oogway_ascends_piano_sheet_music.pdfIn PDF document text
    • http://cozyplacefor.rest/content_cop_ricegum95ves.pdfIn 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/2e317ea9-1508-4542-99a4-73578765e4d2/60653514076.pdfIn PDF document text
    • http://pasofotamuteper.atwebpages.com/psicofarmacos_ansioliticos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7889d819-53cf-41d4-8d5a-1eccf366d4fb/stand_still_meaning_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02b2f9d0-b54d-41e4-8180-6367133244a8/compare_and_contrast_sign_of_the_beaver_movie_and_book.pdfIn PDF document text
    • http://kejagabato.myartsonline.com/sql_injection_tutorial_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c7459c1-deff-44f1-af4f-4c2f10bd334f/zofakawilezovegovuranex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b88b1c2-827c-4584-ae26-83c2149a3e40/english_idioms_in_use_intermediate_book_with_answers_vocabulary_reference_and_practice.pdfIn PDF document text
    • http://girofili.myartsonline.com/46551461164.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A875 5404 bytes
SHA-256: e97acb20dbb114f0da9f45ce3249fa92e38e45db4d5fd4ccf6bfb35992fe6427
font_01_sfnt_off0001bacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BACF 12800 bytes
SHA-256: 148a98dffae694e32b0fe9b80e6a7f7e8abd277b61aec47c06fe63a0c1e725ae

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