Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3953baa24bd249f…

MALICIOUS

PDF

75.7 KB Created: 2021-03-12 10:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4546a3f58e4a10246a59f2c255bd561d SHA-1: 83cb7d537daf627c4e86d8afabb79ade634f6865 SHA-256: e3953baa24bd249f064e9b59ac086c0c95676309b09988cf87c62d37d8eb90ac
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. The heuristic analysis revealed it functions as a link farm, embedding numerous external URIs, many of which are hosted on disposable domains. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', suggesting it may have been generated by a tool rather than being a legitimate document. The presence of many external links points towards a phishing or malware distribution scheme.

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://golowaki.ru/123?utm_term=biasing+of+mosfet+pdf
    • https://cdn.sqhk.co/kafufojugure/agdhgVv/jukorege.pdf
    • http://homearfes.com/78600374783basiv.pdf
    • https://cdn.sqhk.co/rugofufol/Riaggha/snake_vs_block_power_game_online.pdf
    • http://moneyindia.site/what_is_the_first_step_in_planning_an_early_childhood_education_environmentm81gs.pdf
    • https://cdn-cms.f-static.net/uploads/4378378/normal_602d35dd0f0fc.pdf
    • https://cdn-cms.f-static.net/uploads/4366385/normal_60462ac1607bd.pdf
    • http://maykistore.ru/767534257160bgff.pdf
    • https://cdn.sqhk.co/lexaxemiji/digjdUA/jalolafuvuwurigum.pdf
    • http://xutexukoxobofi.mywebcommunity.org/vezixebosevesubiga.pdf
    • http://dietnatur.fun/meme_sound_meme_soundboardxz013.pdf
    • http://mizafejil.iblogger.org/kivebupiv.pdf
    • https://cdn.sqhk.co/jurufovowufu/hjhj5kG/f1_playstation_5.pdf
    • http://lenuvivureropi.scienceontheweb.net/cant_help_falling_in_love_piano_chords_elvis_presley.pdf
    • https://cdn-cms.f-static.net/uploads/4448536/normal_603c8ae97c060.pdf
    • https://cdn-cms.f-static.net/uploads/4500895/normal_5fdbe2e683899.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_0a33ac44979e41e7af80f56d96858585.pdf?index=true
    • http://vawanumezal.onlinewebshop.net/10831680367.pdf
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_c3fb53fcfa79460b98fe49434af4070d.pdf?index=true
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_2f488cb3c93e45a9af4999171509080f.pdf?index=true
    • http://nesosizi.rf.gd/4853454835.pdf
    • http://xujekodade.epizy.com/darakopikejefuvebemetom.pdf
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_d0c3c8e464e94b32a5b063194390edd3.pdf?index=true
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_54f5d8610cb046ef93eb12a15f5d4dcf.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e874.bin
db9a1e7ac230970a6f2607f34b2458e8986ff6d6bd3760902d95299af3b4c909		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE874 5280 bytes
font_01_sfnt_off0000fa62.bin
c49bc16000733032ae10d608042f45f54ab93090ac79ed110c1ba74412d9b2b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA62 11536 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.