Malicious PDF — malware analysis report

Static analysis result for SHA-256 34eca81f70fa4fbb…

MALICIOUS

PDF

79.8 KB Created: 2021-03-19 05:12:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff3d9dcb63441a3573c158e688f5fb5e SHA-1: eebf0fc30b369d3efc31d6ece8dad2c85756ab7b SHA-256: 34eca81f70fa4fbb8d854b24772969255c36b758f271401c05926dd44de3f31e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and a link farm heuristic suggests an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://druttle.ru/wix?keyword=card+wars+kingdom+apk+%252B+obb
    • http://sivolejujivozul.scienceontheweb.net/11662328313.pdf
    • http://rakibanujixarep.iblogger.org/percy_jackson_and_the_lightning_thief_book_chapter_12.pdf
    • https://cdn.sqhk.co/titolegun/gdwiagd/slot_games_that_pay_real_money.pdf
    • http://kekebum.22web.org/weight_lifting_apps_android.pdf
    • https://cdn.sqhk.co/zusegekum/viauieZ/fomamo.pdf
    • https://cdn.sqhk.co/zesokepewami/fogjYhf/pobikugusuga.pdf
    • http://jaxagogilexet.sportsontheweb.net/the_hunger_games_catching_fire_online_read.pdf
    • https://cdn.sqhk.co/negapevu/jYjeRez/gymnopedie_music_sheet.pdf
    • https://raminatu.weebly.com/uploads/1/3/4/5/134579417/f76ab2b0ede702b.pdf
    • http://kedugobepuged.mywebcommunity.org/65186396299.pdf
    • https://novifabapidujup.weebly.com/uploads/1/3/5/9/135975767/2868893.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://xejawaji.myartsonline.com/bridal_chorus_free_download.pdf
    • https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_fbb359341b354cf1988ea73fb870150a.pdf?index=true
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_c8a354c277ce44fbacf24007a89800ff.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b708854c-62df-4747-910a-4fed6a8f3e73/91977901962.pdf
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_eceacee1a5e24e22af987afc416bc37b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b81ef188-6e6f-47f6-b5e6-2bc2c92e055c/vipepikazo.pdf
    • http://foxebunuref.epizy.com/start_again_kyle_olthoff_song.pdf
    • https://uploads.strikinglycdn.com/files/4e88812f-1ab0-448b-86b5-c8742e150858/rakapufo.pdf
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_4f58ef9d17fe4701af1ecc80c4af8678.pdf?index=true
    • https://f4dd034e-00c7-465c-b850-fb2d75accad5.filesusr.com/ugd/769f78_8e1ad4e33406406aaa1dca2c816f699e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/629941e9-5823-4e7a-b4ed-3bb22df4788d/x10_powerhouse_personal_assistant_security_system.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee89.bin
2c518d87aff90e829952a040f1f49aefd838189666b08a6baed13f51565f583f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE89 5156 bytes
font_01_sfnt_off0000fff9.bin
1b5b2065ab0cfa981688e00cb6605671779d91a698e400650c12b6f29f5e1fd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF9 10472 bytes
font_02_sfnt_off000123f1.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123F1 4324 bytes

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