Malicious PDF — malware analysis report

Static analysis result for SHA-256 e028be73758f5b44…

MALICIOUS

PDF

72.4 KB Created: 2021-01-26 00:55:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d0692286d328d632781141588b57592a SHA-1: 379919599822752759ea05d8891d5c019fefa12c SHA-256: e028be73758f5b44f5f6ae8fdc40fe04969e46bd82ce43c7ea5dab7dc8bdf209
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to suspicious domains, flagged by heuristics as a malicious redirector and a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the primary attack vector appears to be the extensive use of malicious links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/wb?keyword=solar%20system%20planetary%20orbit%20simulator In PDF document text
    • http://covidcapsule.world/163100884750iu5r.pdfIn PDF document text
    • http://bioforce-co.site/jolikevezinalame0nxk2.pdfIn PDF document text
    • http://paringljkf.com/old_time_gospel_songs_listvtaf2.pdfIn PDF document text
    • http://copyrightmediahelp.com/panama_city_warrants_divisionopu4p.pdfIn PDF document text
    • http://littlenat.space/light_meter_on_film_camera_not_workingitq32.pdfIn PDF document text
    • http://reduslim-ufficialesito.site/new_trending_music_videos_download2jcvg.pdfIn PDF document text
    • https://vojutodebol.weebly.com/uploads/1/3/4/0/134096580/lepafematutojasibam.pdfIn PDF document text
    • https://nibuwoxemunovox.weebly.com/uploads/1/3/4/7/134714338/2163575.pdfIn PDF document text
    • http://pressit.fun/christmas_picture_quiz_with_answers_printable_2019sth9m.pdfIn PDF document text
    • http://musc-media.xyz/latest_viral_video_of_girl_2020rw88v.pdfIn PDF document text
    • http://reactivascotia2020.com/farm_frenzy_inc_apkqa3xx.pdfIn PDF document text
    • http://storezone.info/widaxititezemazoytp.pdfIn PDF document text
    • http://onenature.space/sumobadafezopufig7hgj8.pdfIn PDF document text
    • http://sexedate69.site/xfinity_prepaid_refillc8sts.pdfIn PDF document text
    • http://redit.fun/antiheroe_definicion_corta25fn7.pdfIn PDF document text
    • https://linanilutujaro.weebly.com/uploads/1/3/1/4/131453593/3a6cb.pdfIn PDF document text
    • http://bossyonlinex.com/mtc_bus_rush_hoursi3l9v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/19455634788.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/totelup.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/police_scanner_android.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_off0000df51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF51 5312 bytes
SHA-256: abcd837e0e45db86a719ec9feffbae00b63d3f35e0aa0da5ab1460d298dc9cf2
font_01_sfnt_off0000f149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF149 10268 bytes
SHA-256: ea849bd985947992cc828d573748819b865787a32aa5e570dd93b2791b94e1d7

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