Malicious PDF — malware analysis report

Static analysis result for SHA-256 9168e84027f67290…

MALICIOUS

PDF

108.0 KB Created: 2021-03-29 13:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e61fd069f40b347c0f1843a17f93e595 SHA-1: eb2262d3ed48a3935e55f371d14a61f971ff4687 SHA-256: 9168e84027f672900084ff6cd40ad9f82e2001f2d899acf554330c759165e0a6
146 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. The embedded URLs and the PDF's structure suggest an attempt to redirect users to potentially malicious sites for phishing or malware delivery. No scripts were extracted, but the PDF's nature strongly implies a malicious intent to exploit user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9867

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://jumiwimov.ru/wix?keyword=unblocked+games+77+defend+your+nuts+2
    • http://prodson.space/388813680898i1cw.pdf
    • http://mmuuue.space/burna_boy_another_story_instrumentalv0t2s.pdf
    • https://cdn.sqhk.co/limizolaxa/XgjBhfy/zombie_survival_games_unblocked.pdf
    • https://cdn.sqhk.co/votawusebak/BH3cxhe/99766422205.pdf
    • https://cdn.sqhk.co/jotenitix/jcgejdu/werewolf_movies_2017_download.pdf
    • http://hhizmet.com/4147673115i0uyy.pdf
    • http://fastcreditcheck.info/miya_bhai_video_song_bestwapq0xcs.pdf
    • http://zarumesa.mypressonline.com/amygdala_hijack.pdf
    • http://islemleriniz.org/torchlight_2_mod_launcher_fix_update_1443qc6.pdf
    • http://totalcreditreport.info/fesofogezorafgcqlj.pdf
    • http://masalev.ru/lesodezebekudokiwafufawo5dcb.pdf
    • http://kuworekokinig.medianewsonline.com/free_baby_bandana_bib_pattern.pdf
    • https://cdn.sqhk.co/jinubodilev/CkUiigc/copart_salvage_auto_auctions_california.pdf
    • http://newser.site/video_downloader_for_instagram_video_lockermjb8d.pdf
    • https://cdn.sqhk.co/ranetixeba/ggdLRFV/cake_baking_games_free_download_for_pc.pdf
    • http://tryporte.xyz/cccambird_48h_apkwpmmw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://7054f9d6-44ea-4b6c-8535-0d04e7cb9957.filesusr.com/ugd/963b03_a4fc15778ad140919afec151adb119c9.pdf?index=true
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_c5f453650d1e463aa22bf5c7470d20c9.pdf?index=true
    • https://3caa4030-7dd6-4be4-8a8a-e1981c45b3cd.filesusr.com/ugd/704988_8feac064959c49feb3bb47b521e44c31.pdf?index=true
    • https://s3.amazonaws.com/bejeseja/5391106224.pdf
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_90de466f0df149ecbb88da3b9a14aeae.pdf?index=true
    • http://jumawivowibeb.onlinewebshop.net/puxuwuki.pdf
    • https://s3.amazonaws.com/fadadedezeker/chariots_of_fire_movie.pdf
    • https://0b46dc67-b6bf-47f6-be73-9cc337a8c672.filesusr.com/ugd/4fb05f_ed70b9757d0f44839da5f7c3a7a087f8.pdf?index=true
    • https://s3.amazonaws.com/lizuseguwix/vivah_full_movie_mp4_360p.pdf
    • https://s3.amazonaws.com/fekife/language_arts_worksheets_grade_2.pdf
    • https://s3.amazonaws.com/dadupawo/igcse_chemistry_past_papers_answers.pdf
    • 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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fc8.bin
3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC8 6440 bytes
font_01_sfnt_off00012fbc.bin
809a03c687c9b34a32465b4683be288c6e8645a6001754801245e92061910159
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBC 5852 bytes
font_02_sfnt_off00014399.bin
63694f3f619cbb2e66fd91139896bd6a7284d10f2fa1e57fb30022c6dff2bd3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x14399 6068 bytes
font_03_sfnt_off00015347.bin
51abcc5ff990dad960f5e6d7ae3ec16e8bbb47c925a0f973ed99c1709fc419c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x15347 17820 bytes
font_04_sfnt_off00018c78.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550
pdf-font-stream PDF embedded font (sfnt) at offset 0x18C78 16036 bytes