Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac10c229bb2c6625…

MALICIOUS

PDF

77.3 KB Created: 2021-03-09 10:58:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f58b301a301eb89758dde32a05ea2f7c SHA-1: 97707770c6011902d4c52fcae6d68f1d081c542c SHA-256: ac10c229bb2c662546a8f3ab205544d3006cea638b6e2edfe5eeeacca2607420
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are structured as a link farm, suggesting an attempt to drive traffic to potentially malicious sites. The presence of a URL related to 'clash royale mod apk download' indicates a lure for users seeking unofficial software. ClamAV detection and ML classification confirm the malicious nature of the PDF, likely used as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/wix?keyword=clash+royale+mod+apk+download+apkpure
    • https://repepojopojak.weebly.com/uploads/1/3/5/9/135970902/9781ec42bc.pdf
    • https://figuzejigof.weebly.com/uploads/1/3/4/6/134644002/e4322.pdf
    • http://pojorabe.iblogger.org/mawatoneb.pdf
    • http://creditreportusa.info/axial_yeti_score_trophy_truck_discontinuedd0ep9.pdf
    • http://mavpa.fun/aarushi_talwar_judgementdurau.pdf
    • http://befelofote.iblogger.org/simplifying_rational_expressions_with_negative_exponents_worksheet.pdf
    • http://muxadar.22web.org/latin_legal_dictionary.pdf
    • https://pisubemiduburor.weebly.com/uploads/1/3/1/3/131380627/lusarotegurugesuki.pdf
    • https://fitabidik.weebly.com/uploads/1/3/0/7/130776693/268d0137c8e9c.pdf
    • https://saripubisopa.weebly.com/uploads/1/3/5/3/135322362/wogadeburavin-lefogume.pdf
    • https://norabemomo.weebly.com/uploads/1/3/0/9/130969424/tibepegabo.pdf
    • http://axecheat7.xyz/kedemijateziretoi5y.pdf
    • https://dezegumi.weebly.com/uploads/1/3/4/1/134108828/9521e709b.pdf
    • http://contact-git.top/xonokaparenegiwdpbp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sukasorepej.rf.gd/xurikasaxuromedipesegalo.pdf
    • http://pipademepazofex.epizy.com/how_to_make_a_taurus_man_pursue_you.pdf
    • https://3caa4030-7dd6-4be4-8a8a-e1981c45b3cd.filesusr.com/ugd/704988_6c1f593cd59148c491c24bab7fae6cb6.pdf?index=true
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_7fcbaceb1b264088a77ef2740134c133.pdf?index=true
    • http://dugupafado.epizy.com/scientific_names_of_plants_in_telugu.pdf
    • http://jekewalesobe.rf.gd/can_i_control_my_vizio_tv_with_my_iphone.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_off0000f26c.bin
2a6d8beeea241198cde8c66ef2858b19ddbc2ff78bed341e090855c1c1525bb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF26C 5364 bytes
font_01_sfnt_off0001048b.bin
8cc0060214d3a169addf541b05401f8f5c621aa8aca2dfa5b826002df451651e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1048B 10212 bytes

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