Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5156ad322bdb4a…

MALICIOUS

PDF

81.2 KB Created: 2021-04-09 19:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: dcd043756234d16f2200712d87680afb SHA-1: 9117a298eb3ed9cba1fea7a5b77cea50f44ed691 SHA-256: 9a5156ad322bdb4ad084596f125327a04d6e868fa63d2748ccf228d471e641db
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://seumenha.ru/strik?utm_term=does+osha+require+certification+for+scissor+lift PDF link annotation
    • https://cdn.sqhk.co/kanemili/cYjfgdG/go_escape_game_walkthrough_factory.pdfIn PDF document text
    • http://mon-compte-cmb.best/870874525818e0hj.pdfIn PDF document text
    • http://deflecfcvy.best/dogozadap6hjk.pdfIn PDF document text
    • https://gewivobom.weebly.com/uploads/1/3/4/6/134643535/1f0c0892efb690.pdfIn PDF document text
    • https://cdn.sqhk.co/juputufom/hfjdEhd/super_brawl_universe_all_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/jbideQb/rc-_airsim_rc_model_plane_sim_mod_apk.pdfIn PDF document text
    • http://findssldz.xyz/niriworawetogebiwonopomw87y.pdfIn PDF document text
    • http://golden-bridge.pro/dungeon_master_s_guide_1st_edition8g33q.pdfIn PDF document text
    • http://legendnat.space/lines_drawn_to_connect_points_of_equal_temperature6hlu2.pdfIn PDF document text
    • http://cetly.xyz/lojobazezunexafmqarh.pdfIn PDF document text
    • http://shlifovka-pol.website/was_were_positive_negative_and_questions_exercisesxyvd9.pdfIn PDF document text
    • http://my-favshopc.online/kumodesekotagisikarukoz4qxqa.pdfIn PDF document text
    • https://powumebaporisav.weebly.com/uploads/1/3/4/8/134891471/7a51aa82686d.pdfIn PDF document text
    • https://texosubos.weebly.com/uploads/1/3/4/7/134715033/nuzidosofeteku_nevalapuzexuzun_tonimov_xefug.pdfIn PDF document text
    • https://kaxemesotom.weebly.com/uploads/1/3/4/7/134732336/ce260385.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/c5c382b5-f140-4d2e-bea1-3237081b26c6/basic_english_conversation_lessons_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc8d7864-5317-47da-913a-1e9457ac5441/modelo_de_nomina_2020_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/roundtable_facilitator_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/beretta_m9a1_compact.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec6bfeb0-206c-4147-b522-33d04379b687/how_to_control_sonos_soundbar_with_samsung_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/45091879669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46f2203-ee29-42da-a6b7-9e10f447827e/dewalt_planer_dw735_feed_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dedd2dfb-fc6b-4f4f-b9b7-17234b6f6a01/gulapejezu.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_off00010018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10018 5096 bytes
SHA-256: 5893326a00bb2ba660a13512e8fb9663078848cc32728c5473aa30be379916b2
font_01_sfnt_off00011173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11173 11056 bytes
SHA-256: 3e3e689cbbce7a1ff9ac06050afda29f421439a99d27b3eb751954d82fbbd087

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