Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d2672c7fdb7351…

MALICIOUS

PDF

74.1 KB Created: 2021-03-06 11:51:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c1e1c2197c5443d47879bc672722bd1b SHA-1: 6a27bf18b53171e82a728ea1821fde5e06f0f25b SHA-256: b5d2672c7fdb7351897d5803b4549aaf97dcae620196aef54b081d8710f4995e
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 0.9997

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://dugedepap.ru/strik?utm_term=macbeth+act+3+quiz+pdf PDF link annotation
    • https://cdn.sqhk.co/muvasesuru/dgehjY5/zafuziwidolebeloj.pdfIn PDF document text
    • https://cdn.sqhk.co/najiligopej/yABhiHP/mlb_playoff_bracket_2019.pdfIn PDF document text
    • http://muzidos.iblogger.org/basketball_drills_to_improve_ball_handling.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/JHjehdl/pifebejebiwesiromevinok.pdfIn PDF document text
    • http://urott-hu.com/piggy_game_for_robux_mod_apk_download5qtq8.pdfIn PDF document text
    • http://reveruverof.medianewsonline.com/maritime_law_enforcement_manual.pdfIn PDF document text
    • http://thechambre.xyz/matrox_monarch_hd_firmware_updatezwnhe.pdfIn PDF document text
    • https://cdn.sqhk.co/kusonemap/fjahajg/70016666189.pdfIn PDF document text
    • https://cdn.sqhk.co/pojizurigos/WEV5Qhf/what_does_obstacles_mean_in_spanish.pdfIn PDF document text
    • http://servempieza.site/what_is_reporting_tools_in_data_warehousing4f2ph.pdfIn PDF document text
    • http://mscgis.net/hitler_the_rise_of_evil_video_guidettgi6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_276846f75d6e4d979870669c71544d75.pdf?index=trueIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_c779bd11117e4018824fb38fdc81d879.pdf?index=trueIn PDF document text
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_8e56065365254827ae95cab54b6513f6.pdf?index=trueIn PDF document text
    • http://mokodipixa.epizy.com/printable_durable_power_of_attorney_form_florida.pdfIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_4eff7ac0e9df4e1781a8f4b7dd328539.pdf?index=trueIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_9edee827da7648fbb61a2fa57d5072eb.pdf?index=trueIn PDF document text
    • http://pigutun.myartsonline.com/81799400572.pdfIn PDF document text
    • http://resawopo.epizy.com/1830702444.pdfIn PDF document text
    • http://togaretib.epizy.com/how_to_write_a_story_for_beginners.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_off0000e518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE518 5424 bytes
SHA-256: 8ebd3cec0bf49d4087ee007b86771d04f479cb2442e697d745ac5db3b5b67e6e
font_01_sfnt_off0000f798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF798 10556 bytes
SHA-256: bd473c067691e9c0018e0defbecf8358760aa487afa40111734f17c959c043fd

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