Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f65b6624e47ca97…

MALICIOUS

PDF

77.9 KB Created: 2021-04-21 08:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 70227d055e52a277adfc4cdfde353ac3 SHA-1: 218287d767fab9605c93aafcd5288af70198150f SHA-256: 1f65b6624e47ca97a3aa693f18fe306fb5bf2e9557586f7ac0cbea23b759da88
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content, likely a phishing page or a download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://gimoguvi.ru/strik?utm_term=why+is+my+sling+not+working PDF link annotation
    • http://wipunemobak.mygamesonline.org/scert_books_download.pdfIn PDF document text
    • http://lulaterunudagob.iblogger.org/adventure_time_city_of_thieves_cast.pdfIn PDF document text
    • http://gayerkan.com/corian_distributors_near_mefebum.pdfIn PDF document text
    • http://zijofazasogija.getenjoyment.net/kawivojuxut.pdfIn PDF document text
    • http://chambrehq.xyz/que_es_sistema_inmunitarioraryz.pdfIn PDF document text
    • http://getepitisux.mywebcommunity.org/3157011788.pdfIn PDF document text
    • http://xilavinem.medianewsonline.com/small_business_plan_template_free.pdfIn PDF document text
    • http://opensol.xyz/angry_birds_transformers_online_hack_generator_tooldq6lm.pdfIn PDF document text
    • http://azakalaza3.xyz/charo_dham_mata_pita_re_bhajankdd2g.pdfIn PDF document text
    • http://clebohets.xyz/985594092578quzo.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
    • https://uploads.strikinglycdn.com/files/656db982-28ae-4dec-9456-faf134836864/reddit_security_analysis_q4_2019.pdfIn PDF document text
    • http://wasizematimom.rf.gd/serta_motion_iseries_adjustable_base_power_cord.pdfIn PDF document text
    • http://nizowozutagele.atwebpages.com/design_notation_in_software_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/lokai_bracelet_size_guide.pdfIn PDF document text
    • http://sanikivatuma.rf.gd/jeep_grand_cherokee_overland_2014_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1af1ea2-fb1c-48c8-8697-778812dd9574/7609534230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad5e3007-3034-4ce2-a4db-9d106754f479/why_does_my_toilet_run_every_few_seconds.pdfIn PDF document text
    • http://nibatozov.epizy.com/rarezi.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/fozedipotekasid.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/bloodsport_movie_free_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6adf0368-b8f8-4cbd-8683-a9804ac202ae/amos_and_boris_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc8e60e8-f281-4346-9f60-9574cd5fac9b/things_fall_apart_chapter_14_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/pozivulawezedal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d1e74ea-59e7-4cf0-bca3-3e4bcac79e60/xedagivarutufurukokino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b4c5516-1e60-4038-8b5c-1e9c14d8490f/humminbird_depth_sounder_transducer.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/7002085028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e887aa7a-61ae-4983-aaee-00a6282b7620/70051523736.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75B 4832 bytes
SHA-256: 0cb5d640c05cd53526ac49a4db1b9f6fdf5347c98a778b201ac3046fd9d907d9
font_01_sfnt_off0000f7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AA 10852 bytes
SHA-256: 74e38af6fb936dbd79dbbd630becea07283b611ac6de90d7e394e762bf994b7a
font_02_sfnt_off00011be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE9 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361