Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f478947877c18ee…

MALICIOUS

PDF

78.7 KB Created: 2021-03-14 03:35:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 857409385956e69d004c2e5e699115c6 SHA-1: dd81e9a8b544ca73ca1015b8b0de2ac351253102 SHA-256: 9f478947877c18eedbc88abcafaf2cdeaabbfdc22a8ec99760e37da853f11bf9
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The embedded URL, 'https://resalured.ru/123?utm_term=secure+folder+android+8.+0', suggests a phishing attempt related to a secure folder application. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/123?utm_term=secure+folder+android+8.+0
    • https://cdn-cms.f-static.net/uploads/4392439/normal_600d35b2abce4.pdf
    • https://cdn-cms.f-static.net/uploads/4459329/normal_604a02899f9c4.pdf
    • https://cdn-cms.f-static.net/uploads/4471723/normal_602de28ed6619.pdf
    • http://kedisuli.iblogger.org/brother_dcp-7065dn_driver_windows_7_32_bit.pdf
    • https://cdn.sqhk.co/kazamepa/dkibmhg/cute_cat_pictures_hd_wallpaper_download.pdf
    • https://cdn.sqhk.co/wevafofed/idienhd/45527175950.pdf
    • http://nonretloli.site/soccer_world_cup_final_2020_pakistan3ctun.pdf
    • https://cdn-cms.f-static.net/uploads/4422144/normal_60111a7361012.pdf
    • https://cdn-cms.f-static.net/uploads/4412387/normal_603eee0422c3f.pdf
    • http://aycotoro7.xyz/tipezaoqdj2.pdf
    • http://qwonder.space/30552903038eyztr.pdf
    • http://beautysale.site/tet_key_answer_sheet_2018vwec9.pdf
    • http://rostov-mobile-doctor.ru/gloomhaven_cragheart_perks1l839.pdf
    • https://static.s123-cdn-static.com/uploads/4416791/normal_5ff65dbdabea7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vozajaw.rf.gd/ocarina_of_time_strategy_guide.pdf
    • https://s3.amazonaws.com/sevoga/zenaxemowevite.pdf
    • https://s3.amazonaws.com/mutirexa/how_to_do_half_life_chemistry.pdf
    • https://s3.amazonaws.com/xupovobejanam/90145944728.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e14c.bin
b7a8c16e20e9fcf393b0775bcb530f8c0c107d96edf32d385ab9a566274cc452
pdf-font-stream PDF embedded font (sfnt) at offset 0xE14C 5308 bytes
font_01_sfnt_off0000f366.bin
f232e36fdbcb41edd02827a04419f44779166d5f0b848e7f7e3436acef6d7acb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF366 10688 bytes
font_02_sfnt_off000117e8.bin
7e63eb3bed9c4ceaf47e86587cf77a789dba98dd2b4db382f0c7f052a0aeb8ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x117E8 16160 bytes