Malicious PDF — malware analysis report

Static analysis result for SHA-256 8920c6cd7a99a5bf…

MALICIOUS

PDF

96.0 KB Created: 2021-03-24 13:25:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c6e40af52d6afad26cac53955790724 SHA-1: 26eb778c7977bf4a7c7f8012d6bf856eb0094085 SHA-256: 8920c6cd7a99a5bfe75337249698b6544d1d0b8d4acbd310a4637e73cbe4ee71
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 URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be a lure related to a search query. The presence of an external URI and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

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://golowaki.ru/award?keyword=milady+chapter+24+facial+makeup+pdf
    • https://cdn-cms.f-static.net/uploads/4455669/normal_60350fd0a285f.pdf
    • https://static.s123-cdn-static.com/uploads/4497082/normal_5fe5d14417f89.pdf
    • https://cdn.sqhk.co/loxowopiv/5orlEjj/91471988947.pdf
    • https://cdn.sqhk.co/keridola/wfhfTgd/fumikilopireta.pdf
    • http://basvuruizleme.online/l.o.l_imagenes_para_imprimirnrcdn.pdf
    • http://luxisulejoxo.getenjoyment.net/how_to_take_firework_pictures_with_nikon_d3400.pdf
    • https://cdn.sqhk.co/gabotewobe/i9ihjjf/dead_effect_2_android_size.pdf
    • http://shopsmmv.site/chatham_high_school_athletic_forms8mscu.pdf
    • https://cdn.sqhk.co/pazaxefuma/2bEhaAy/nfl_network_spectrum_channel_number.pdf
    • https://static.s123-cdn-static.com/uploads/4403119/normal_5ffed2982e9b0.pdf
    • https://static.s123-cdn-static.com/uploads/4389601/normal_60022565c24a5.pdf
    • http://pupigojoniru.mypressonline.com/list_of_adjectives_grade_4.pdf
    • https://cdn-cms.f-static.net/uploads/4424025/normal_60176b80d1981.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/1d32ec57-df33-42dc-ae3d-b8c055fa2d6b/tozuxaluruzanib.pdf
    • https://s3.amazonaws.com/jeworurowam/3256176243.pdf
    • http://vivetusukuv.onlinewebshop.net/88291315520.pdf
    • https://s3.amazonaws.com/tawosutosuxi/wojewob.pdf
    • https://s3.amazonaws.com/mizeteb/fimafixaf.pdf
    • https://uploads.strikinglycdn.com/files/4b9ea24f-04d8-4dba-81a6-7343fb9053d5/dyson_vacuum_cleaner_dc39_spare_parts.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_off00012ca9.bin
1746e6e48eedea48de7f48117ac46bccc33db6fd643d0fbe4591931732c9af77
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA9 5276 bytes
font_01_sfnt_off00013ea9.bin
04058e370c21611481ce29e13f930ac75413aa47bf2269dc556cd1c161c41f75
pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA9 11180 bytes
font_02_sfnt_off0001641d.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x1641D 4324 bytes