Malicious PDF — malware analysis report

Static analysis result for SHA-256 c925b4ace75fe3bb…

MALICIOUS

PDF

85.9 KB Created: 2021-04-08 02:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 404c55bd946ff51c62d978155cd30b90 SHA-1: da6d207c761f695ae3f7e799978074292535c1da SHA-256: c925b4ace75fe3bb955e504c8842870f2b4c97288ba780aa8c5b095c7e19acfb
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The embedded URL and heuristic firings suggest the document is designed to trick users into downloading a file, likely by masquerading as a free game. No scripts were extracted, but the presence of external URIs points to a download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/123?utm_term=bouncing+ball+mobile+game+free PDF link annotation
    • http://tohld.in/what_is_transmission_heat_losssd6nq.pdfIn PDF document text
    • http://winoorama.space/create_the_atomic_orbital_diagram_foy4zeg.pdfIn PDF document text
    • http://abreudesigns.com/935818366576l0ec.pdfIn PDF document text
    • http://yourdesk.website/gotez3bhcz.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://pakebixulo.epizy.com/kinixitakonalesexuragi.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/katsuoji_temple_japan_guide.pdfIn PDF document text
    • http://febinobe.epizy.com/24436999687.pdfIn PDF document text
    • http://fubolorira.epizy.com/dulafojutokepibav.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/60832963826.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/gb_whatsapp_no_ads_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/97452549192.pdfIn PDF document text
    • http://natomig.rf.gd/8483295170.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/bet365_poker_apk.pdfIn PDF document text
    • http://revupeponalewuj.epizy.com/shell_logo.pdfIn PDF document text
    • http://fokotizemol.rf.gd/how_do_you_measure_the_rate_of_photosynthesis.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/job_cost_report_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/95933296534.pdfIn PDF document text
    • http://davupuvaf.rf.gd/miwesinoru.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/acknowledgement_for_internship_report_human_resources.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/nakoxos.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/free_letterhead_template_photoshop.pdfIn PDF document text
    • http://fefadazagiwafuz.rf.gd/45889781954.pdfIn PDF document text
    • http://wozasunode.rf.gd/dipujalujexax.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/voldemort_origins_of_the_heir_bande_annonce_vf.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/behringer_umc202hd_manual_portugues.pdfIn PDF document text
    • http://vejidot.epizy.com/3710663558.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_off000104a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A2 5016 bytes
SHA-256: babb39cd44bd218a3f0d70ef5aed1f8933d0d2f72ebcbf02a87b8708a9dc8286
font_01_sfnt_off00011593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11593 11472 bytes
SHA-256: bc8531a84c0ca99970513bfc60e59029b723b4d48d27a44669fe700d6ff789a1
font_02_sfnt_off00013c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C12 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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