Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d4fd1bf2a878e4…

MALICIOUS

PDF

77.6 KB Created: 2021-05-08 16:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 97b301b6a514540f1c684d3f0377666c SHA-1: 924a33719b61b2452c1940dfdf8c6c00d3b4da97 SHA-256: 17d4fd1bf2a878e4fc0858185f170f9560174e770878ccbcb99fba8623c45455
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to lead users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/strik?utm_term=cyberpunk+2077+time+zone+map PDF link annotation
    • http://mozobadijoba.medianewsonline.com/tatalaksana_asidosis_metabolik.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/mazijatixerolatam.pdfIn PDF document text
    • http://dalifajebuxog.scienceontheweb.net/mutapuzukakedajezezo.pdfIn PDF document text
    • http://riniwodifole.medianewsonline.com/80204841122.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/iijikhj/bubble_shooter_jungle_pop_game.pdfIn PDF document text
    • https://cdn.sqhk.co/xokipuxat/XhhWhhI/today_s_hit_ringtones_free_new_music_ringtones.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvinudubuno/xzhbpif/jogo_moto_wheelie_2_dinheiro_infinito.pdfIn PDF document text
    • http://lukufogud.getenjoyment.net/61270235418.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/jeep_tj_ls_swap_manual_transmission.pdfIn PDF document text
    • http://wejnpowk.space/abu_garcia_silver_max_reel_partsyl2gu.pdfIn PDF document text
    • http://tegotapiw.scienceontheweb.net/44455510196.pdfIn PDF document text
    • https://cdn.sqhk.co/jasuxerazifo/jakk1he/mci_airport_hotels_park_and_fly.pdfIn PDF document text
    • https://cdn.sqhk.co/vovigewuva/QihQ5dE/jabudojor.pdfIn PDF document text
    • http://study-english-05.site/dovixutozulesutgly0.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/4614217664.pdfIn PDF document text
    • https://cdn.sqhk.co/mokevesin/hhihhju/27650370905.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/ghI0qMo/54265370312.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/wajufifenoxuj/professional_cv_templates_word.pdfIn PDF document text
    • http://pizitibasowu.atwebpages.com/renedodifuj.pdfIn PDF document text
    • http://natizuf.onlinewebshop.net/8691026984.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/96439503512.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/hormones_powerpoint_templates.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_off0000efbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBE 5372 bytes
SHA-256: a574ed6fb97a6c64a59ab913cea20bd4cf42efbd95478f2db3fac83fd70cf34c
font_01_sfnt_off00010202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10202 11668 bytes
SHA-256: aca4926cecb325b8a862fd58a8c0d058234f6f9969312427429a180c19d292ce

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