Malicious PDF — malware analysis report

Static analysis result for SHA-256 c73336012dce3322…

MALICIOUS

PDF

77.1 KB Created: 2021-03-11 03:51:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 908f0f1445cb941fea9f5c28e0a3edad SHA-1: 542114a8a54e9ca945f50bb0bdcf100ac0979643 SHA-256: c73336012dce3322de8a99f41f3991ae5290a36fbaf163eee8eab539a060c260
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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/award?keyword=acupuntura+auricular+pdf PDF link annotation
    • http://lamisorosasam.mywebcommunity.org/computational_fluid_dynamics_cfd.pdfIn PDF document text
    • http://9gusevshop.space/free_halloween_flyer_templates_photoshopoyd4s.pdfIn PDF document text
    • http://chtotakoevuxom.biz/igt_slot_machine_modelsoetgt.pdfIn PDF document text
    • http://sokegex.mywebcommunity.org/behringer_europower_pmp2000d_2_000w_14-channel_powered_mixer_with_multi-fx_processor.pdfIn PDF document text
    • http://ins.expert/missing_punctuation_worksheet_ks2xm5xn.pdfIn PDF document text
    • http://boxijogirexu.medianewsonline.com/where_to_buy_blood_bowl_miniatures.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/ergjKhg/jungle_animal_hair_salon_games_online.pdfIn PDF document text
    • http://naturalm.space/70582941329wrirk.pdfIn PDF document text
    • http://beach-fruit.fun/68752657507s3vay.pdfIn PDF document text
    • http://xxlmature.site/dodge_caliber_dash_lights_flickeringuofqg.pdfIn PDF document text
    • http://girlita.space/bluestacks_controller_not_workingk9j0u.pdfIn PDF document text
    • https://cdn.sqhk.co/regomesu/dY8Dhbd/pixel_4_xl_stock_ringtones.pdfIn PDF document text
    • https://cdn.sqhk.co/rilabotib/0rxAH1R/german_ardennes_offensive_1940.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/pioneer_av_receiver_vsx-532_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/losokifape/NhbjauV/border_officer_system_requirements.pdfIn PDF document text
    • https://cdn.sqhk.co/bepoweruga/xiiN8ia/free_download_bubble_breaker_game.pdfIn PDF document text
    • http://lipenav.mypressonline.com/selling_skills_course.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/veeder_root_serial_interface_manual_tls-350.pdfIn PDF document text
    • http://rijexofugovu.medianewsonline.com/casio_protrek_watch_set_time.pdfIn PDF document text
    • http://pihodze.com/xujekisibabisevizujotofubct5vu.pdfIn PDF document text
    • http://anyita.space/86228132375qmopg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/34208960643.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/v_shred_fat_loss_extreme_bundle.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/intel_dh67bl_ram_slots.pdfIn PDF document text
    • http://lamupimifuban.onlinewebshop.net/what_can_alexa_do_on_fire_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/bolero_clarinet_solo_sheet_music.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_off0000f385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF385 4960 bytes
SHA-256: 0f5fdfd07198be156291971d5b9e79d533928ce5e2aff50b3b7a64ef448503f2
font_01_sfnt_off00010477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10477 10100 bytes
SHA-256: 99cd39b31a47aff05f8384af77e895abe101184ea240d8332b4b8b14c14a76ca