Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8d17ab9c301fd91…

MALICIOUS

PDF

75.0 KB Created: 2021-03-14 03:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d058f05d60da5c78b16f96849a4e5915 SHA-1: 7129935a5fcde4d62686f59059426dfafb69e855 SHA-256: f8d17ab9c301fd91098d83ac2c70eabb965fc5532f3f980281b683ac290b7118
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to suspicious domains and are likely part of a link farm designed to host malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. The embedded URLs suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/wix?keyword=magic+rush+heroes+mod+apk+ihackedit
    • https://gilamasizate.weebly.com/uploads/1/3/0/7/130775108/49931.pdf
    • http://lenijer.22web.org/shark_rocket_ultralight_vacuum_reviews.pdf
    • https://widosutolitidaf.weebly.com/uploads/1/3/4/8/134847614/jowupotulamosi-walatizuvabix-tugatexapagow-gapof.pdf
    • https://levapexufusetij.weebly.com/uploads/1/3/4/9/134904519/pakusarusurapanarumi.pdf
    • https://wigabededonekan.weebly.com/uploads/1/3/0/7/130740374/lipewodu.pdf
    • https://medivurufif.weebly.com/uploads/1/3/1/4/131407406/39da905d9.pdf
    • https://juwujumatel.weebly.com/uploads/1/3/4/0/134042908/zelijilanebugur_goxawas_gibixodirono_pibovupu.pdf
    • https://venunuwaxel.weebly.com/uploads/1/3/2/7/132740799/kesetewuzi-raluriwamo.pdf
    • http://tarufubu.iblogger.org/40942620386.pdf
    • https://gonupedifi.weebly.com/uploads/1/3/4/5/134524362/butiwob.pdf
    • http://timecodes.net/american_psycho_musical_scriptgousd.pdf
    • http://bristol-yalta.run/tea_cup_pomeranian_dogs9phu5.pdf
    • https://juvarefuj.weebly.com/uploads/1/3/1/3/131398009/salonuledabutov_kepigugom_felekijolapixe_bowobagegisetix.pdf
    • http://it50disconto.pro/estudio_biblico_palabras_de_vida_eternaii0hi.pdf
    • https://xuzuvakewose.weebly.com/uploads/1/3/1/6/131637797/4084364.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/42938425-c72a-42e9-a3f8-b7693f971a29/bryant_furnace_model_number_nomenclature.pdf
    • https://uploads.strikinglycdn.com/files/60d8502b-ea5c-40b7-a3cc-0eeaa1a267f2/51809917484.pdf
    • https://uploads.strikinglycdn.com/files/6919da6b-8806-4636-80f2-0fa86afa9a01/hunger_games_catching_fire_movie_spoiler.pdf
    • https://uploads.strikinglycdn.com/files/d58cbb35-620f-44cd-8e46-abe26b067590/11690323476.pdf
    • https://uploads.strikinglycdn.com/files/87c0c74f-dc00-4f32-9b3b-88f520fa4136/coast_guard_staffing_standards_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e601.bin
6228c1544b35595c39a903e7ce36eedfc6795562e39035cd43c0a30d3455637a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE601 5524 bytes
font_01_sfnt_off0000f8ac.bin
c0907c1ee9221da42898240387972b79739c22c603605b12c9e394a0b85b6953		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AC 11164 bytes

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