Malicious PDF — malware analysis report

Static analysis result for SHA-256 93feffb0b8fbfcdb…

MALICIOUS

PDF

78.5 KB Created: 2021-04-22 17:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3933f0019aac65652e8687293c04c337 SHA-1: ba8168d397aa347b8530d5288de0e6256153d8cb SHA-256: 93feffb0b8fbfcdbb3a1c7c535271bc7a305a2fe831059887e38aea30add1e0b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs are consistent with techniques used to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/strik?utm_term=is+inbreeding+bad+for+dogs PDF link annotation
    • http://teaitalis.space/guess_movie_name_by_emoji_with_answerscwavz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483870/normal_5fd9e7bd0345b.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/ukg_activities_worksheets_free_download3zd8o.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/vakebu.pdfIn PDF document text
    • http://sysfix.ru/34422872827hw563.pdfIn PDF document text
    • http://suporefebakibur.mygamesonline.org/dinike.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372087/normal_60044d2241522.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/iiL0WDz/mp4_hd_movies_free_download_bollywood.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/descargar_el_pianista_latino_hd_utorrent5ugmw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462350/normal_5fff5a7bafc82.pdfIn PDF document text
    • http://nature-ital.space/kedarusazopapudexebetb48t3.pdfIn PDF document text
    • http://oneitshop.pro/bupegalikufabajabemotofnel.pdfIn PDF document text
    • http://tujijamutibe.sportsontheweb.net/tijef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383321/normal_5ff22bd15b3ea.pdfIn PDF document text
    • http://jixewelo.scienceontheweb.net/idilio_mario_benedetti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471475/normal_5fd8090312afb.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/aiS4sjf/outdoor_rock_climbing_classes_near_me.pdfIn PDF document text
    • http://yatvoyya.fun/examples_of_good_listening_skills_in_the_workplacevt3yz.pdfIn PDF document text
    • http://thelait.pro/fasaxe6fok4.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/Y9hjXjc/blue_eyes_video_song_mp4_hd.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/adding_integers_word_problems_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/W8ki5hb/88486723147.pdfIn PDF document text
    • https://cdn.sqhk.co/gizulakofo/M3gcjgF/19779953451.pdfIn PDF document text
    • https://cdn.sqhk.co/nanagajog/pEhhfgc/97234216737.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EE 4828 bytes
SHA-256: 9787994591c5e98af731ef77bcd561148b0f6ef945ab07c49b7fa024afd271d9
font_01_sfnt_off0000fa49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA49 10824 bytes
SHA-256: 34b1b8d68eb20b84f6ca3a7f638b3c2121566c16f75ab55564c414ed55ad93c5
font_02_sfnt_off00011e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E68 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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