Malicious PDF — malware analysis report

Static analysis result for SHA-256 25c37d33f1bae5d4…

MALICIOUS

PDF

85.0 KB Created: 2021-02-23 08:05:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1f913e806fc79cd56a7cc055ce790bd SHA-1: d28ddb110424bab5ef2d0d43123d2804ec6a7c4c SHA-256: 25c37d33f1bae5d4444a5ef34de70933f9c62cdcfad831f39518f6c97767a6a1
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1190 Exploit Public-Facing Application

The PDF contains an embedded URI pointing to a suspicious domain, and the document body, though heavily obfuscated, suggests a lure related to virtual currency codes. Heuristics indicate a payment redirection lure and ML classification strongly flags it as malicious. The presence of external URIs and the nature of the lure suggest an attempt to redirect users to a phishing site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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/wix?keyword=codes+for+animal+jam+diamonds
    • http://terem.space/guideline_for_coronary_artery_bypass_graft_surgeryrozhp.pdf
    • https://cdn-cms.f-static.net/uploads/4424405/normal_601219e1ce263.pdf
    • https://cdn.sqhk.co/tozegatopaxu/Dnciari/caller_screen_for_tiktok_amazon.pdf
    • http://dkmz2.club/wiwivaxesigadetii9g1c.pdf
    • https://cdn.sqhk.co/fujotojaxob/FmVigic/57723129984.pdf
    • https://cdn.sqhk.co/vujenibolo/Khi9giC/parachute_home_vs_brooklinen_towels.pdf
    • http://babysampler.com/printable_weight_loss_chart_for_group1ujbp.pdf
    • https://cdn.sqhk.co/baxijaxazixi/LRvRhdd/dofofusuv.pdf
    • http://jitokinut.iblogger.org/abhiman_bengali_full_movie_480p.pdf
    • http://obzorov.site/tisenurexuxokebaxekiwy7vts.pdf
    • https://cdn-cms.f-static.net/uploads/4470828/normal_602058085dfed.pdf
    • http://zupeset.22web.org/biwofedipesukugixaji.pdf
    • https://cdn.sqhk.co/xufojidaju/R8iehe1/freebies_meaning_in_marathi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://koxosam.rf.gd/19225536089.pdf
    • http://wagupamodesugub.rf.gd/wekogodupemowagureruvule.pdf
    • http://kapodos.rf.gd/manualidades_con_madera_paso_a_paso.pdf
    • http://vagoposejexuma.epizy.com/80480863418.pdf
    • http://didoratanusej.rf.gd/bizilosamuvukija.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001036a.bin
a8d8329ac7c14558cd06ab7881fd077e50f87a2cc40ee179eff85adaa6870f70
pdf-font-stream PDF embedded font (sfnt) at offset 0x1036A 5032 bytes
font_01_sfnt_off0001146a.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1146A 1800 bytes
font_02_sfnt_off00011cf8.bin
1e925cbde737b450c71ef52da8d57af0d940b65037ec5d8fb7f738f3a82b71c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF8 12652 bytes