Malicious PDF — malware analysis report

Static analysis result for SHA-256 898cb7ef091d533c…

MALICIOUS

PDF

75.3 KB Created: 2021-02-25 15:35:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 40477146f158131246814e166f822567 SHA-1: cda448528e5adba0f44640e293ebb6c18bc6f5c8 SHA-256: 898cb7ef091d533c60458f91b5737fbba10dabde515555bbf115fa6f2bd36844
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, likely intended to host phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure and embedded URI suggest it is part of a phishing campaign, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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/strik?utm_term=what+are+the+top+rated+portable+oxygen+concentrators PDF link annotation
    • http://risopik.22web.org/olentangy_local_schools_spring_break_2020.pdfIn PDF document text
    • http://clientbluebadge.com/love_story_ukulele_chords_fingerpickingu9ors.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447912/normal_60379f98b08fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494431/normal_6000c987ef53d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482860/normal_5ff8016c70e23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408348/normal_5fe549b059313.pdfIn PDF document text
    • http://poradoit2.site/electronic_devices_and_circuits_boylestady435g.pdfIn PDF document text
    • http://good-production9.site/which_chainsaw_brand_is_the_best21n6x.pdfIn PDF document text
    • http://getcreditcheck.info/894010031494omr2.pdfIn PDF document text
    • http://matcobzor.ru/idsa_guidelines_pneumonia_2016jq7lr.pdfIn PDF document text
    • http://vuxokiwi.22web.org/how_to_netflix_on_mac_pro.pdfIn PDF document text
    • http://triple-doska3.club/zefupetesajizum56s1u.pdfIn PDF document text
    • http://ideal-it.fun/rectangular_and_circular_waveguide2pd93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368227/normal_6004a6a9d0870.pdfIn PDF document text
    • http://misstourist.info/coreldraw_for_macbook_pro_freeusigf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418746/normal_5fea39eea435f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466173/normal_5ffbbd0470156.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379723/normal_601f7db02b110.pdfIn PDF document text
    • http://jakartapro.xyz/vidikobakanaseriwipasacnw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kijenor.epizy.com/30899714852.pdfIn PDF document text
    • http://bupagaruwizuzu.epizy.com/fda_stability_guidelines.pdfIn PDF document text
    • http://gamemogap.epizy.com/free_adobe_audition_1._5_full_crack.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_off0000e708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE708 5660 bytes
SHA-256: 87d4356222853b97c697218b5a47e47f242d333ca479d41d2d0059c20d8e1c57
font_01_sfnt_off0000fa54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA54 10884 bytes
SHA-256: e1074635b9028fd30be260130ae5b275639695219e1aadd0661d1e5703635778

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