Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ae8437cc311916…

MALICIOUS

PDF

70.5 KB Created: 2021-03-10 03:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaba4fba97deec808fe7d78b6cb4b821 SHA-1: 18f69bcff2a6f3147f718a00a61ee2baabf8cc42 SHA-256: 87ae8437cc3119169c66b64381b973e8d3d9dd5aa199f2a89ce53943c4f14271
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to statistical variables. The presence of an external URI strongly indicates an attempt to redirect the user to a potentially harmful site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/award?keyword=types+of+variables+in+statistics+with+examples+pdf
    • https://static.s123-cdn-static.com/uploads/4470692/normal_5fce08aca02ba.pdf
    • http://kifisafobubupo.mygamesonline.org/all_of_me_john_legend_sheet_music.pdf
    • http://japancar-sib.ru/gisizopelowd0xf.pdf
    • http://tevutubiwij.getenjoyment.net/xuwesufazeman.pdf
    • https://cdn-cms.f-static.net/uploads/4503214/normal_6019d64d1c29d.pdf
    • http://pedagodogiko.getenjoyment.net/18858193033.pdf
    • http://dazolovegom.mygamesonline.org/autocad_2021_download_size.pdf
    • http://lefefegibilapo.22web.org/88626454816.pdf
    • https://static.s123-cdn-static.com/uploads/4488842/normal_5fdea17f26336.pdf
    • http://lovelyhouse.online/macklemore_can_t_hold_uszqbtj.pdf
    • https://cdn-cms.f-static.net/uploads/4476780/normal_6032feba60503.pdf
    • http://rat-red.space/financial_feasibility_report_meaningsav84.pdf
    • http://boraguw.medianewsonline.com/la_cancion_de_nosotros_eduardo_galeano_gratis.pdf
    • http://dvestideyli.xyz/befuxut1doc5.pdf
    • http://ladirojenovezoj.mygamesonline.org/asmaul_husna_calligraphy.pdf
    • https://cdn-cms.f-static.net/uploads/4474997/normal_601bcc1cd11a2.pdf
    • https://cdn-cms.f-static.net/uploads/4417403/normal_601eba40ab99d.pdf
    • http://gejulavofanutar.mygamesonline.org/lalupulo.pdf
    • http://rajebamif.22web.org/43338087720.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vimiromomekex.epizy.com/99901638530.pdf
    • http://danijikuguwidak.rf.gd/flowchart_creator_online_free.pdf
    • http://naxokagad.epizy.com/53885133859.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_off0000d547.bin
88a13bc7012f657d980d49dbd4e01581edccb5269ed39e8fa79ef46be173953f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD547 5804 bytes
font_01_sfnt_off0000e8f5.bin
d7b3b9cbc7c7819d6d5da104f59bf5dd2c4739fe216b0e17aaeb3e3516544049
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F5 10416 bytes