Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04ad1788255d258…

MALICIOUS

PDF

109.8 KB Created: 2021-03-27 17:49:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a8f16e261b36473f983fe24368d9d502 SHA-1: 94c7784a79ecaec6c81cc3966fffa2f7631677f5 SHA-256: f04ad1788255d25846d737cc2daa90b93b1089aff98ac39642be7e9d4722ce80
186 Risk Score

Malware Insights

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

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 0.9967

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/award?keyword=mathematics+pedagogy+questions+pdf PDF link annotation
    • https://cdn.sqhk.co/zirevazul/Y2TRjdl/best_vr_games_ps4_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nakizenonetu/cjgzjcb/best_free_mp3_music_player_app_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/delotijuw/cZPjfgf/mizozamamifejul.pdfIn PDF document text
    • https://warodimaziwini.weebly.com/uploads/1/3/4/6/134611971/8313077.pdfIn PDF document text
    • https://tunoritusaw.weebly.com/uploads/1/3/5/3/135328070/daketuzirofe_mixuvuwusilok_kamiwiwoba_gapixolizuwilev.pdfIn PDF document text
    • https://cdn.sqhk.co/wujugojuse/yehfgiJ/evolved_dragonlord_aqw.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwalimo/SjcUiiJ/wallpaper_billie_eilish_when_the_party_s_over.pdfIn PDF document text
    • https://garituba.weebly.com/uploads/1/3/4/3/134335889/6551525.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/besanuborasevefesasufok.pdfIn PDF document text
    • https://cdn.sqhk.co/xolafunodo/XxeUBaP/tajobiwafuled.pdfIn PDF document text
    • https://cdn.sqhk.co/zeliravepuj/0blnPgg/baratukekonapob.pdfIn PDF document text
    • https://cdn.sqhk.co/satukevaguka/0Fwjiha/robot_boy_cartoon_series.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/ggvKagd/table_tennis_rules_game_point.pdfIn PDF document text
    • http://nevinidonet.mywebcommunity.org/17778316389.pdfIn PDF document text
    • http://tuvosudokalidu.scienceontheweb.net/tipos_de_carga_electrica.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/Kgguid8/express_payroll_portal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_088282a6c86447bbab92fc641ec635af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fofeguj/nutaxabe.pdfIn PDF document text
    • http://fogokenum.onlinewebshop.net/adobe_photoshop_7.0_tutorial_in_hindi_full.pdfIn PDF document text
    • https://a6047d18-b57f-4fdc-88fa-dea7715a8642.filesusr.com/ugd/189347_a6f9a9454e9f4b6d8114e13abc1cfa2b.pdf?index=trueIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_7746fb6f44e84239befac13ac5c9255a.pdf?index=trueIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_b369d5f5f4404bac8e5ed82151171598.pdf?index=trueIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_92e1e9d3251d4ef7b246f33bc1edbbef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/netugirisu.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B19 5556 bytes
SHA-256: d3e091866f780e1c9cf4192e2a63338403e2c642cc0d94abea0f1fc74db68153
font_01_sfnt_off00013ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDF 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off00014942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14942 11300 bytes
SHA-256: 7b86bcffaf81414561b355b62e7a43eaecb2a12ab343b80a088770709765164c
font_03_sfnt_off00016fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FAB 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
font_04_sfnt_off00017dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DAC 14188 bytes
SHA-256: 4d970f8aa7d705d59096e3310ea75f5ff84234a0b5ffca1440cbc952fadede5f