Malicious PDF — malware analysis report

Static analysis result for SHA-256 814899b0bff5f31d…

MALICIOUS

PDF

100.9 KB Created: 2021-03-09 18:15:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a5dd9f1eabf909e54609a41f540c34bf SHA-1: 5a5e5a01e35b039bd205fd221dda58f2949c0a92 SHA-256: 814899b0bff5f31dc5bf142bd9a98f33308c28f87ae1c32cafa0bbf7d6209ab0
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 0.9964

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://leonvi.ru/123?utm_term=x+plane+simulator PDF link annotation
    • http://llloooodddd.space/pemonewivugupezuvixeparbixv1.pdfIn PDF document text
    • http://limons.space/phoenix_wright_ace_attorney_trilogy_ps4z6cn8.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/firewall_configuration_in_network_security.pdfIn PDF document text
    • http://generalmassage.online/48971110277cv2ej.pdfIn PDF document text
    • http://stroymarketmetal.ru/scientific_approach_to_managementr4oax.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/tagegetifepavogiperitize.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/harry_potter_and_the_goblet_of_fire_full_movie_in_english_dailymotion.pdfIn PDF document text
    • http://copyright-notice-ig.com/affirmative_action_in_education_pros_and_conshlrfn.pdfIn PDF document text
    • http://austritkfa.com/basukirizur13y8y.pdfIn PDF document text
    • http://small-italy.space/23280190583io8fo.pdfIn PDF document text
    • http://znakomstva18x.site/87430340786crsv4.pdfIn PDF document text
    • http://yatvoyya.fun/python_basic_interview_questions_mcq750us.pdfIn PDF document text
    • http://emirofficialzm.com/what_is_uconnect_ramn06sb.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/mexotuvubp6n35.pdfIn PDF document text
    • http://lightly.store/sipiridizinigezupumufovagr2rf8.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/14490410199.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/atp_ki_full_form_bataye.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce916770-51e0-40e8-835f-117d905ef31d/78248932472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6963e74b-b614-446a-b70d-790985636a42/jejome.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/cash_flow_statement_format_indirect_method_cbse.pdfIn PDF document text
    • http://sorisavitekinuj.onlinewebshop.net/merebusosos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/054d112e-434f-4916-928c-3642d07ea8da/2019_ford_mustang_ecoboost_turbo_upgrade.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/windows_movie_maker_windows_10_free_download_italiano.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://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B1 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off000117a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A5 4944 bytes
SHA-256: 52634bfa605f01b129e57109e468fd516a0e3f063ebe9cc99bc7a1a438557ab7
font_02_sfnt_off0001285b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285B 8976 bytes
SHA-256: 7e98081f44ff9be21f2be21d17426fa35b07cfbadd26ac3f6cbb691f5ce60abc
font_03_sfnt_off00013a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A17 1936 bytes
SHA-256: 84daf345e21b08075a6e329eeacb0a13a0447ddcc3efc64e98a9a4ab9c6a9d9d
font_04_sfnt_off00014358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14358 15124 bytes
SHA-256: c0a107208b73fd275872dbd38ac6ca60bcebdeac767eb17b0cd9a5f6f64e42f7
font_05_sfnt_off00016fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FBE 16128 bytes
SHA-256: 0767e4d95dae1263b04d42e1f9f32e172355dc911a709f2787c8da5b30292565