Malicious PDF — malware analysis report

Static analysis result for SHA-256 967dbc2e31852075…

MALICIOUS

PDF

77.6 KB Created: 2021-04-02 01:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dca6476891208d47af29feda35db9420 SHA-1: 1e4ff0fbf4cd3b7578f3dacb5b03b6e49a54a696 SHA-256: 967dbc2e31852075aa433d2aca9387b2c724fb10f93cdd5a3d4c9b2460a08aed
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 0.9993

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://zajinet.ru/strik?utm_term=are+sentry+safes+fireproof PDF link annotation
    • http://sibogufurab.medianewsonline.com/definicion_de_temperamento_en_psicologia.pdfIn PDF document text
    • http://pisumuvate.sportsontheweb.net/xodidedis.pdfIn PDF document text
    • http://zokoxakabu.medianewsonline.com/crowding_definition.pdfIn PDF document text
    • http://piwifeg.22web.org/nofem.pdfIn PDF document text
    • http://kewavixim.22web.org/new_audio_song_in_tamil.pdfIn PDF document text
    • http://vewefoma.getenjoyment.net/sanexenazebapimubev.pdfIn PDF document text
    • http://nakekizedexu.getenjoyment.net/bangkok_map_with_tourist_spots.pdfIn PDF document text
    • http://zugugalepew.mypressonline.com/48947462070.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/61675092114.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://povodakav.myartsonline.com/newborn_umbilical_cord_care.pdfIn PDF document text
    • http://luvebex.rf.gd/can_i_share_my_apple_icloud_storage.pdfIn PDF document text
    • http://mefenip.epizy.com/divergent_test_questions_and_answers.pdfIn PDF document text
    • http://fotizojorirepel.onlinewebshop.net/51196704306.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/4_accords_toltques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/546c853a-7d75-4770-a88d-0d2bfd51e86c/120_is_what_percent_out_of_1000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2103a5d1-a0ec-4982-a691-f70f50234ee2/e-myth_revisited_chapter_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30a33f7d-9751-4b64-b914-6f225b15239a/43887634015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9e59055-14f3-4acc-8e4f-90623a1c9d06/nubigojivom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad2b0ab0-15f1-40bc-a4f9-3b12e1a0ba9b/pazumodibexobik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07d25357-c1b8-48e5-9d90-070eba45dfb4/sears_craftsman_router_table_25444_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27c8373-9919-44bb-a00c-ad4d3eafa360/what_is_the_kinetics_of_a_reaction.pdfIn PDF document text
    • http://fajazimigig.atwebpages.com/mukelananufane.pdfIn PDF document text
    • http://tinasixubu.epizy.com/instagram_apk_2018_julio.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_off0000f154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF154 4956 bytes
SHA-256: ce5c07ad5da6a40883c5d084616bb62c667ca0cd6d1e6cf0aceaf985f5c87b62
font_01_sfnt_off0001024b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024B 11396 bytes
SHA-256: b2645c66521b202b631666fcac2814fcf5fe7b75223276687e172ffabf95c3b0

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