Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a95ad664f4c203…

MALICIOUS

PDF

66.9 KB Created: 2021-04-07 15:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9dc8f93cbc613ffec9bdcc28a95d8a7b SHA-1: c949ef17de2e9ddbaf8e87a39cdd16f8fc4ef8c6 SHA-256: 82a95ad664f4c203cba09207d8cdef3f38f90b563c2ca1c08fd9ee7d536d3fa7
126 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that redirects to a suspicious domain, identified as a link farm on disposable hosting. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The document body, though partially garbled, contains text that appears to be a lure for an 'art activity', suggesting a social engineering pretext.

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://jottigo.ru/strik?utm_term=i+wanna+iguana+art+activity PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499942/normal_60129545d7ae0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446502/normal_603952473d0fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501656/normal_605281b48a737.pdfIn PDF document text
    • http://povisowalikim.scienceontheweb.net/beauty_and_the_beast_theme_piano_sheet_music.pdfIn PDF document text
    • http://genusttwsr.fun/goladege63uxm.pdfIn PDF document text
    • http://vofufime.mypressonline.com/polk_audio_db1240dvc_12-inch_dual_voice_coil_subwoofer.pdfIn PDF document text
    • http://1freedom.space/9651580612167cq8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368225/normal_5fe243ea6a6a3.pdfIn PDF document text
    • http://rujewazaxijaza.sportsontheweb.net/all_branches_of_philosophy.pdfIn PDF document text
    • http://cyberlife.store/lg_washer_not_draining_and_making_noisernonm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rebomedug/74992714884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75c5ccfd-376d-4608-b890-557fba4ac27b/bijotebanufivedoko.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/how_do_you_put_a_calculator_in_degree_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a57505-a45a-455a-8c14-d311f9051cd1/dabupebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9842c017-b402-4b6b-9b34-322a24f9322f/what_is_an_it_management_degree.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/outputstream_to_bitmap_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c9e546f-c069-4264-9d18-6c1090e32bb8/porsche_owners_club.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4d5a0d-6d46-400f-a791-c1b4c80aac72/twilight_breaking_dawn_part_2_full_movie_in_hindi_download_720p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b20c2f1-d942-4542-9894-e62b8038da03/bodyweight_bodybuilding_routine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e321ca79-3055-41f0-9e1d-669849e4f384/marvel_avengers_movies_imdb.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/81500913037.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_off0000c9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B9 4948 bytes
SHA-256: 86bc05558011eeac250566310e22bdb3e4874fb54a831ac751f88bf902dda2d6
font_01_sfnt_off0000dac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC2 9936 bytes
SHA-256: 7d3b66c5662536adf5d72843e21df814a8ccdec153e68309452fbf5af008e3c9

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