Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe83706ab6391af9…

MALICIOUS

PDF

93.7 KB Created: 2021-04-23 15:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 01d7373bbb7726faeac5eb091de8230d SHA-1: 3b949fdda5b466e5007ce0565e978eb7f6602329 SHA-256: fe83706ab6391af90b3d938ca6af8fcb2e702876b08ef5a6f21c48f3c30bfa04
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 0.9970

Heuristics 5

  • 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.
  • 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://leonvi.ru/strik?utm_term=learn+arabic+apk+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369907/normal_604e3170b8ea8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530910/normal_6063dd7e0ce17.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/spanning_tree_protocolaypei.pdfIn PDF document text
    • https://jarowezib.weebly.com/uploads/1/3/0/8/130813985/xamajuf.pdfIn PDF document text
    • https://nukusuruv.weebly.com/uploads/1/3/1/8/131857442/8729440.pdfIn PDF document text
    • https://wekowegalovu.weebly.com/uploads/1/3/4/6/134668649/64bfd052ac2a.pdfIn PDF document text
    • http://didazema.mypressonline.com/pared.pdfIn PDF document text
    • http://kojanusipesipe.scienceontheweb.net/practical_english_usage_new_edition.pdfIn PDF document text
    • http://dobofozepop.mygamesonline.org/blink_malcolm_gladwell_trke.pdfIn PDF document text
    • http://texifudosino.mygamesonline.org/succeed_at_a_level_sociology_book_two.pdfIn PDF document text
    • http://ecosbor.net/atmega328p-_pu_datasheet_fullvtua8.pdfIn PDF document text
    • http://larekew.mywebcommunity.org/rudux.pdfIn PDF document text
    • http://zootime.store/how_to_empty_a_craftsman_shop_vaclqtwy.pdfIn PDF document text
    • https://zetapowopes.weebly.com/uploads/1/3/0/8/130813904/a0c97448556b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392862/normal_5ffb98029b956.pdfIn PDF document text
    • http://piwofoterif.sportsontheweb.net/tirojisuniwotuvufulevu.pdfIn PDF document text
    • http://lafilubepojev.scienceontheweb.net/95686550813.pdfIn PDF document text
    • http://nezowigivomi.scienceontheweb.net/jzyk_angielski_dla_pocztkujcych_irena_dobrzycka_chomikuj.pdfIn PDF document text
    • https://xifupanudolegu.weebly.com/uploads/1/3/1/1/131164204/rijapemalulexiluk.pdfIn PDF document text
    • http://fruitnaturs.space/nexozutifubagedujasadivqe3tm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459325/normal_5fdf026c83a31.pdfIn PDF document text
    • http://gazagidumow.mygamesonline.org/2437379893.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tibamupebunod.atwebpages.com/accueil_et_secrtariat_en_anglais.pdfIn PDF document text
    • http://rabelame.atwebpages.com/gojoxararukanogejuneli.pdfIn PDF document text
    • http://xasagode.myartsonline.com/definicion_de_calidad_segun_iso_9000.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ede6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE6 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off0000fddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDB 5208 bytes
SHA-256: 007ad5d13ad666b747ff3717324c8e8caec2883fb0ace1f95220af09b81c8f28
font_02_sfnt_off00010fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB2 6812 bytes
SHA-256: 62962f971533fb6d7b8b8fe60c67af52be0080aecc76b1bb3c99d80f87b12728
font_03_sfnt_off000127a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A4 11856 bytes
SHA-256: c2f87114ae369e5ea1e58b13704ac1c494a31fe8098f066927a7203e21bdf7ac
font_04_sfnt_off00015032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15032 16668 bytes
SHA-256: 1ed432c6afa462aa21998c44168690b2b2ee7d3bd08ad30ef58bbf6e43f6d37d