Malicious PDF — malware analysis report

Static analysis result for SHA-256 215bbecde7b694db…

MALICIOUS

PDF

77.4 KB Created: 2021-03-08 22:52:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 98e3a8ae06709e4d8e19130b03af87ab SHA-1: f4f3c4fb6c7a3877ada2582862e75c7c1a7645be SHA-256: 215bbecde7b694db35638589ebf744e4358a33d16844249396e0ed6e119b2723
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable hosting, and uses a lure related to technical specifications to trick users. The presence of external URIs and a link farm on disposable hosting strongly suggests an attempt to redirect users to malicious content or download further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/123?utm_term=dell+latitude+e7470+spec+sheet+pdf PDF link annotation
    • http://rowexusaje.mypressonline.com/bestselling_novels.pdfIn PDF document text
    • https://cdn.sqhk.co/gozolijitow/Bbncgdb/best_vegan_chocolate_cake_recipe_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/aiiidge/96316583829.pdfIn PDF document text
    • http://ek-arenda.ru/super_teacher_worksheets_geometry_answer_keybmsle.pdfIn PDF document text
    • http://vevufilusik.scienceontheweb.net/valolofobiwu.pdfIn PDF document text
    • http://fionainthefield.org/20890915155kc3u2.pdfIn PDF document text
    • http://wovuwukotuvoxi.mygamesonline.org/bavabowirefar.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/visadikiwonusazitibonu.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/fesedanatoxa.pdfIn PDF document text
    • http://aycotoro5.xyz/58972358337brh4v.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/re4iajf/cool_math_cooking_ice_cream_games.pdfIn PDF document text
    • https://cdn.sqhk.co/miburixegapu/jfghiit/14622222768.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/30106565958.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/IhaRgf4/vosavusuzexi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d054ec7f-6eb1-447a-bb70-6324b383f2d6/apa_ethics_code_forensic_psychologists.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/paweseko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8757144e-86bb-4fcc-a365-23774fcd91fb/gonifokasegixuvimaxajet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d915ae4-fb2e-4d18-85ee-5b5e4f8494b6/should_i_buy_a_wii_u_in_2020.pdfIn PDF document text
    • http://tefetuzuzip.myartsonline.com/harry_potter_and_the_goblet_of_fire_book_chapter_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/547752bc-a83f-4131-8e50-cd3b74c12a13/jawakululutulopuvedatudad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0c0783-23bd-452b-91a3-66084044a13c/421_foxfire_cove_starkville_ms.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_off0000e358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE358 5124 bytes
SHA-256: 28c0a6cfbd4af6689f5c0a5b7807c57a934eba338874670226cfb1cbb4ea8186
font_01_sfnt_off0000f4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EB 11040 bytes
SHA-256: a9d962ea822fa1b3de6ba0eadc9590fac83d1d8cbe68158b738d5828ab032922
font_02_sfnt_off00011a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4C 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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