Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a72a55546ec8ae9…

MALICIOUS

PDF

90.6 KB Created: 2021-03-31 10:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: be17af2e2826bb91b2d0d612c7f79ae4 SHA-1: ec9a2c5895b1b7f50e97983efcc3d08e792856a8 SHA-256: 0a72a55546ec8ae9dda257efb00bb7f1dffa190b444a3722547f50d67a50890f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or malware distribution. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also strongly flagged it as malicious. The presence of embedded URLs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://ponafet.ru/strik?utm_term=%2528nh2%25292co+polar+or+nonpolar PDF link annotation
    • http://xezixaz.getenjoyment.net/wobabedafokefed.pdfIn PDF document text
    • http://brosbass.com/timex_marathon_watch_walmartjl54y.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/bhhjluZ/aesthetic_cute_anime_wallpaper_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/cghbwja/avatar_maker_girl_games.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/tabaterozunevatowat.pdfIn PDF document text
    • http://changely.club/wereke6stg.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/bTiRcm0/39110741301.pdfIn PDF document text
    • http://ninuxalezopo.getenjoyment.net/chaupai_sahib_path_download.pdfIn PDF document text
    • http://luminar2-download.xyz/375112091557ruim.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/rudesefas.pdfIn PDF document text
    • http://erethiztzj.space/melusenanuxonhjda.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwopazeg/GjdNcif/super_mario_world_my_emulator_online.pdfIn PDF document text
    • https://cdn.sqhk.co/wifepodilojo/s2Rbqjh/beat_the_boss_phone_zanco.pdfIn PDF document text
    • http://botefin.medianewsonline.com/redskins_newspaper_washington_post.pdfIn PDF document text
    • http://websporizle4.com/acrylic_nail_starter_kit_near_meiy8y3.pdfIn PDF document text
    • http://piriveva.scienceontheweb.net/samsung_xpress_m2875fw_replace_new_imaging_unit.pdfIn PDF document text
    • http://zabovawupe.mypressonline.com/anatomia_y_fisiologia_de_ano_y_recto.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/11934887-15b1-43b6-adcf-4e7fccabd8aa/bomisupogipuzobizatejuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c78146c-bf70-4ea0-b111-3f48a1e82770/will_there_be_a_cirque_du_freak_2_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d593b4f6-df82-475d-a607-591953a6bb2f/12451280586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae78a63d-f770-4a63-87b8-d7bcf620403a/sinubabeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ab3e069-eb0b-4db4-b7eb-b1b1c69ab367/21701777190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/565a8933-6330-4ba0-a5c6-95529903d6b4/how_to_make_papa_johns_thin_crust.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5a505b4-1a5e-4f90-8265-f0717087447c/nirubugedilixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9015414-56b2-4d46-bfc4-9803bc24e409/what_is_the_meaning_of_isotropic.pdfIn PDF document text
    • http://fijumusuxolegoj.atwebpages.com/isomerism_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da86e94b-ee85-4dc8-b359-87c9702dab83/roku_3810r_specs.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_off0001176f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176F 2900 bytes
SHA-256: 9c84aca5171cf4522e1fd23f3e5391e17c8e645cdcb740b4c3036af6865bd014
font_01_sfnt_off000121b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B4 5036 bytes
SHA-256: 7c3a9f12cdef3cae7f69cf9fa0212b4563e7bd46ab6b6e474e447a0522f61da1
font_02_sfnt_off000132dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132DC 11572 bytes
SHA-256: 955d779c3b9eb5251e9ff69d58c59e0fa8ad9b6963c1e82922ef66a69c4c1baa