Malicious PDF — malware analysis report

Static analysis result for SHA-256 626bcdd159336761…

MALICIOUS

PDF

87.1 KB Created: 2021-03-24 07:04:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4ce3ccda6e57aaacacbc702cf9276455 SHA-1: ee5f36792c215227f630477c1112e23e57e05d85 SHA-256: 626bcdd159336761ebac40fb6c723b1e7cb0286452b804395ffe97910f3e698e
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 0.9991

Heuristics 6

  • 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 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/123?utm_term=aiag+fmea+manual+latest+edition+pdf PDF link annotation
    • https://cdn.sqhk.co/putuziboki/hihbjdM/nawukutiraro.pdfIn PDF document text
    • http://parkingtest.xyz/internal_communication_plan_template6ubui.pdfIn PDF document text
    • https://cdn.sqhk.co/doxelatofon/jfgiSrA/4th_grade_learning_games_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/1ibiejf/electrical_calculations_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/sadopore/i7iN0Cv/36930723153.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/fZhdha2/neon_beats_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/bFieigD/najugafeke.pdfIn PDF document text
    • http://mishgen.com/fowapimotovugudowesozusuhcg1p.pdfIn PDF document text
    • http://maduzisuzavi.22web.org/70326922440.pdfIn PDF document text
    • https://cdn.sqhk.co/gesafafo/7hiwv06/warzone_2100_version_3._2_3_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/widiroje/heMhiib/validity_fingerprint_sensor_driver_setup.pdfIn PDF document text
    • https://cdn.sqhk.co/tevimuwijile/gLjinhd/download_3d_8_ball_pool_game_for_pc.pdfIn PDF document text
    • http://risejesifisem.22web.org/50794396834.pdfIn PDF document text
    • http://pakisonuzaruwav.iblogger.org/anarkali_malayalam_full_movie_free_cinemavilla.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ecc4b077-82d2-4cf1-ad45-1e482560a890.filesusr.com/ugd/5d7ac5_afd2fa2047774f9eb90ebe3071a2bab3.pdf?index=trueIn PDF document text
    • http://pawegafed.rf.gd/43531341188.pdfIn PDF document text
    • http://jaguradimesarut.epizy.com/46777323372.pdfIn PDF document text
    • http://lenixad.epizy.com/amsoil_oil_filter_cross_reference_guide.pdfIn PDF document text
    • http://luzivamo.epizy.com/acceptance_letter_for_scholarship.pdfIn PDF document text
    • http://kidojudal.epizy.com/investigation_report_example_pnp.pdfIn PDF document text
    • https://efed9c07-4553-4484-a419-1b844d271aeb.filesusr.com/ugd/6f475a_5dc04647f2194339adc81fefb7d9672f.pdf?index=trueIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_12670e95432f4c63a9f9bb9480f27719.pdf?index=trueIn PDF document text
    • https://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_ad6694935b5a40afba1f16833bf1b1e2.pdf?index=trueIn PDF document text
    • http://xesidif.epizy.com/11103159190.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_off00011779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11779 5256 bytes
SHA-256: b56acc1e632e4cd489e78f5165b5d1c78b50c60319b5a49f0d151f2cceb300b8
font_01_sfnt_off00012954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12954 10884 bytes
SHA-256: f2edb922033563ec091e743c44e90661a137f452517ffe3515927aeea0113732

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