Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34078cd7a2a4b1b…

MALICIOUS

PDF

71.2 KB Created: 2021-03-21 08:25:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd614e3b7acbcdcd924b51a2ad054707 SHA-1: 1eee782b7b095b444e3a1022dd340c534518c44f SHA-256: d34078cd7a2a4b1b2f4448547d5691a74efded93d7ac993fea8c66ab61d9407c
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The presence of external URIs suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=does+the+post+office+have+passport+forms
    • https://cdn-cms.f-static.net/uploads/4366045/normal_600b3c2e3fd4b.pdf
    • http://lowwsaw.xyz/wemalulilobizilexoj3b9o.pdf
    • https://cdn.sqhk.co/zolewiko/YbifKje/rapesawubidu.pdf
    • https://cdn.sqhk.co/muvasesuru/Tqhahh8/dopeweraxefubis.pdf
    • https://cdn-cms.f-static.net/uploads/4469631/normal_604cd151665ee.pdf
    • https://static.s123-cdn-static.com/uploads/4481988/normal_5fcbddc757976.pdf
    • https://cdn.sqhk.co/livulopo/HhiheQB/liverpool_tickets_premier_league.pdf
    • http://natural-shop.info/nepilenepiwomijinus13c9p.pdf
    • http://lnstagramcopyrighthelps.com/calm_down_crossword_answermbipr.pdf
    • https://cdn.sqhk.co/mogujawogo/Qjg88ja/53240672178.pdf
    • http://freud.icu/15754890099r0rqg.pdf
    • https://cdn.sqhk.co/xesofosirija/ejbJTcP/xonizevuraza.pdf
    • http://naturfresh.fun/dog_sled_guide_jobs_canadatm7n9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6f7a6180-0eb7-47dc-9e67-37d30bedf2ad/excel_vba_range_variable_row_and_column.pdf
    • https://uploads.strikinglycdn.com/files/718cf913-f3a2-4778-af74-bcabc42c6998/pirusaj.pdf
    • https://uploads.strikinglycdn.com/files/feb85b95-3466-47ba-ba63-2981d4281922/89336216097.pdf
    • https://uploads.strikinglycdn.com/files/e8e983df-7a12-4036-a680-07d30e18086e/94627427945.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_off0000d94c.bin
07579659aabd3e61b9a64870b07097f8e90fd3f00e225ee0398642c3f730af0a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD94C 5280 bytes
font_01_sfnt_off0000eb2b.bin
e8392a63ab2d9ad9885795e5652279c366cf057572aaeae4825cfcb8ff9f135b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2B 10752 bytes