Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2b1aeef48228e9…

MALICIOUS

PDF

82.3 KB Created: 2021-03-15 21:33:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a7ce0c3dc4f8472c26f80021bd9d2281 SHA-1: 9d559a96b039364a6aa18760f042db3eb1aef14c SHA-256: 0f2b1aeef48228e9b484160fac1ad586541eea99f57c5b39509b4280e6851cf8
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URIs that redirect to potentially malicious domains, such as 'vilenefex.ru', suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to a book title, aiming to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://vilenefex.ru/award?keyword=aircraft+design+a+conceptual+approach+6th+edition+pdf PDF link annotation
    • https://gibimigiwu.weebly.com/uploads/1/3/4/7/134748980/9f7cada4.pdfIn PDF document text
    • http://wssummer.space/nabujorevazamudujinhpsju.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/g6gjiiG/36571368384.pdfIn PDF document text
    • http://xijeboxebifariz.22web.org/western_digital_my_cloud_ex2_ultra_8tb_review.pdfIn PDF document text
    • https://cdn.sqhk.co/kinifukix/Fjdiiic/black_matted_gallery_wall_frames.pdfIn PDF document text
    • http://kieverts.xyz/historia_de_mxico_resumenjsmdu.pdfIn PDF document text
    • http://kemikavar.mypressonline.com/vowilolukapegibizepu.pdfIn PDF document text
    • https://fuxarudoniw.weebly.com/uploads/1/3/5/3/135350341/bexidopof.pdfIn PDF document text
    • http://vladmer.ru/the_little_match_girl_movie_disneyos1ik.pdfIn PDF document text
    • https://cdn.sqhk.co/tamupoto/YjcKIhd/uk_pool_pocket_size.pdfIn PDF document text
    • http://richmaya.site/blood_episode_1wir5r.pdfIn PDF document text
    • http://mufawajidoxe.22web.org/chernobyl_underground_pc_game_free.pdfIn PDF document text
    • https://kexawugidatenak.weebly.com/uploads/1/3/4/3/134338825/gusututasitati.pdfIn PDF document text
    • http://sodowetan.mywebcommunity.org/university_of_south_carolina_map.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/11322251409.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/40754254113.pdfIn PDF document text
    • https://xuwawimo.weebly.com/uploads/1/3/0/7/130739806/a3509bea1ec7904.pdfIn PDF document text
    • https://xalumalalo.weebly.com/uploads/1/3/4/7/134766869/fupakefuguxuba_birova.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/a63206b9-4eda-49d3-8e90-0364f3a4ef6f/homeland_ra_salvatore_read_online.pdfIn PDF document text
    • http://dunupepemogakiw.epizy.com/59316343036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83cee14d-b624-437f-9bcc-247a59963f27/83132531410.pdfIn PDF document text
    • http://wafibajew.epizy.com/carrier_cassette_air_conditioner_manual.pdfIn PDF document text
    • http://jixolekajes.rf.gd/60562562741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/689fe3de-8149-40b0-95e4-2ba8ab7591fa/futipebezojelepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/522a7b57-ea92-4c72-bcb5-0b92de575fb0/what_channel_is_fox_on_directv_today.pdfIn PDF document text
    • http://wokidomogu.onlinewebshop.net/bosageva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f295a7d7-12ed-40e5-bd2a-2036098d15c9/percy_jackson_demigod_powers.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_off0000f399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF399 5444 bytes
SHA-256: 17d14603b775e3201a5982ce7902a9191916b04f7c1360979d2b68f071c346f2
font_01_sfnt_off00010608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10608 11492 bytes
SHA-256: 985fd489af0843f9d7fe05c1cebb73af69dd0e0be03e17783fb64c13f215de8b
font_02_sfnt_off00012cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333