Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67b17d3693c0127…

MALICIOUS

PDF

78.7 KB Created: 2021-03-14 23:34:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87ad9e4a35938f9e272a3ec89831aae0 SHA-1: 54081351bea71b1ab17d771b5027871f9beb10e0 SHA-256: f67b17d3693c01276f34048c0ce3bca9f028ae9e9656dced776f8ee5031b553d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a domain that appears to be used for distributing malicious content, disguised as a search result for an academic paper. No scripts were extracted, but the presence of embedded URLs and the nature of the detection suggest a phishing or malware distribution attempt.

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://seumenha.ru/award?keyword=swarm+intelligence+principles+advances+and+applications+pdf
    • http://shoplus.info/filmmaker_pro_apk_unlockedh0yk6.pdf
    • https://cdn.sqhk.co/feletitami/igGgfhh/gears_war_2_lancer.pdf
    • https://wisiwojapano.weebly.com/uploads/1/3/4/8/134896472/nivufijadat_fegolaf_tavapodexu.pdf
    • https://xekuvezenigut.weebly.com/uploads/1/3/5/3/135346982/af5912e0.pdf
    • https://cdn.sqhk.co/morexemodoju/ieRTENW/tumblr_wallpaper_hd_phone.pdf
    • http://megatorg.ru/what_is_love_without_pain8p69b.pdf
    • http://rometolipopi.iblogger.org/fly_tying_tool_kit_for_sale.pdf
    • https://cdn.sqhk.co/vemudumuxixu/ijQZOje/52720806203.pdf
    • https://rirujidina.weebly.com/uploads/1/3/5/9/135957349/9190014.pdf
    • https://gobewuguwug.weebly.com/uploads/1/3/6/0/136056794/6446939.pdf
    • https://misurenagikokiz.weebly.com/uploads/1/3/5/3/135332419/5936610.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://noderisaxe.rf.gd/free_tri-_fold_flyer_templates_word.pdf
    • http://wokofidikud.epizy.com/put_on_the_whole_armour_of_god_images.pdf
    • http://gasigigi.rf.gd/97686832309.pdf
    • http://difiravopaju.epizy.com/good_will_hunting_in_spanish.pdf
    • http://tibugesifavetel.epizy.com/xarulapapanozizosenune.pdf
    • http://gogidovegesoxe.epizy.com/63943670975.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_off0000e853.bin
755e3f2253f293d4a6359a9a3de0864694dd8b66b49c7485050dbe41d9a47637
pdf-font-stream PDF embedded font (sfnt) at offset 0xE853 3428 bytes
font_01_sfnt_off0000f466.bin
99c31a95b21b6bf107bca6ed05decbd43980b1ae8d1962673dcbde397043b730
pdf-font-stream PDF embedded font (sfnt) at offset 0xF466 5732 bytes
font_02_sfnt_off000107e9.bin
2cd2fb811056cd32b4d050a64aad9d9f44cc2ae2f826cde821fd0f5993448a4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x107E9 10388 bytes