Malicious PDF — malware analysis report

Static analysis result for SHA-256 61aa8e1a82b7d93f…

MALICIOUS

PDF

83.7 KB Created: 2021-05-08 20:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 555d11cd93f622c63d5ca56524c1c71d SHA-1: 5d809414052de57f6a64688dd23ef746b9ab32fb SHA-256: 61aa8e1a82b7d93f06ff66188ff074a01ad1b3169ed2c33cf8f1cdd4ca09c786
134 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to movie downloads, aligning with a lure to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/strik?utm_term=maze+runner+1+full+movie+download+in+hindi+480p+bolly4u
    • https://cdn.sqhk.co/vivokunavu/gFngfMW/durham_rescue_mission_men_s_campus.pdf
    • http://vuwefedope.sportsontheweb.net/obras_de_fray_bernardino_de_sahagun.pdf
    • http://demask.space/48797609871gdx2b.pdf
    • http://zatizoxitosake.22web.org/nusamik.pdf
    • http://securityverifiedservices.com/4505841025u7ipg.pdf
    • https://cdn.sqhk.co/womawuxinuge/bgixPie/video_live_wallpaper_android_source_code.pdf
    • http://gooddevice-online.com/77455611928gypz.pdf
    • http://rent-nout.site/68917223916mrai2.pdf
    • https://cdn.sqhk.co/wadupaxi/pZQhbja/hill_climb_racing_2_apk_dinheiro_infinito_2020.pdf
    • http://nashremont.site/en_nombre_de_la_rosa_pelicula_completa_en_espaol_latino_megammurf.pdf
    • http://malitaludim.iblogger.org/3594862639.pdf
    • http://kompledom.com/cricbuzz_for_pc_windows_7s3cgh.pdf
    • http://remeik.ru/wemaledoxuratafesitebituls3bi0.pdf
    • https://cdn.sqhk.co/dusivubeleza/gjhjegc/us_military_conflicts_in_the_90s.pdf
    • http://jojidasusesot.sportsontheweb.net/hospital_pharmacist_cv.pdf
    • https://cdn.sqhk.co/duxajoje/R0hdTx8/gixozezapogatepudesa.pdf
    • http://fitit.space/tokyo_ghoul_season_1_ending_song_lyricsrh2f6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bapinusajix.rf.gd/psalm_91_niv.pdf
    • http://rokidibamufoduv.epizy.com/jotemox.pdf
    • http://jemileti.atwebpages.com/70895804429.pdf
    • http://nukilaba.myartsonline.com/53335883091.pdf
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_10d14bda4e7541739eeb9cf5d5f05c52.pdf?index=true
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_b9ba2fb88dd64adc9f0270be25601ce7.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e900.bin
127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE900 6744 bytes
font_01_sfnt_off0000f9e7.bin
02fe0229884158cab1b2f89743463da3eb7554aedd2c8ba7b4eb70b70029dcd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E7 6028 bytes
font_02_sfnt_off00010e6c.bin
172930bac85bd3bd98a30b6a3451fa7d886b4850dc15fb1c8e56fbc00c23d766		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6C 1704 bytes
font_03_sfnt_off000116ee.bin
f3be646c29adb098a5adf2ef0637261156db2006a963c129482f82b25da22037		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116EE 11340 bytes

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