Malicious PDF — malware analysis report

Static analysis result for SHA-256 580056ab293a93eb…

MALICIOUS

PDF

78.0 KB Created: 2021-03-29 01:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae9bcf2942343eb93ec9c2a1c8948161 SHA-1: 50e1964246edfd007c4ef38f0c6b6e8f647df105 SHA-256: 580056ab293a93ebe22b7f11a95a3579c920779d6baafee2eff13a17b7b9200b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an external URI pointing to a URL that mimics a search result for a free biology book, suggesting a phishing or malware distribution lure. The presence of numerous embedded URLs further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/award?keyword=high+school+biology+book+pdf+free+download
    • https://cdn.sqhk.co/segenapiza/fsgirv6/yandex_browser_alpha_app_download.pdf
    • https://static.s123-cdn-static.com/uploads/4366029/normal_600049de213c2.pdf
    • https://cdn-cms.f-static.net/uploads/4424026/normal_6037fe2914e63.pdf
    • http://netzamka.ru/artificial_intelligence_movie_dual_audio_480ph2hyr.pdf
    • http://ptmonline.ru/how_much_does_it_cost_to_replace_an_ice_maker_in_a_refrigeratorpbuti.pdf
    • http://streichpack.online/pamase5lgs0.pdf
    • http://pitushok.space/notes_icon_png_freejvdym.pdf
    • http://about-igsupport.com/gakujik28nqr.pdf
    • https://cdn.sqhk.co/sisagoku/idMhfid/happier_marshmello_road_edm_dancing_called.pdf
    • https://cdn.sqhk.co/xeloxilava/jXiiYie/nugeliwuvulixavex.pdf
    • http://kadanijojabuf.mywebcommunity.org/public_administration_books_in_gujarati.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • https://cdn-cms.f-static.net/uploads/4407998/normal_602eed200d1e8.pdf
    • http://fullpisetc.ru/10967347709d2rir.pdf
    • https://static.s123-cdn-static.com/uploads/4495974/normal_600072ad52234.pdf
    • http://milansit.space/dimewujilobavegen3staf.pdf
    • https://cdn.sqhk.co/rujiwujik/bkv8Pij/stargazing_bubble_tent_joshua_tree.pdf
    • http://rabiwitijif.medianewsonline.com/marebadexat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://voxavupe.epizy.com/92726368411.pdf
    • http://pojozija.onlinewebshop.net/87832149060.pdf
    • http://begodep.epizy.com/the_encyclopedia_of_witchcraft_and_demonology.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_off0000e35c.bin
395720e9db71fd740eeace6294084f1525989f685ae09d7a71cc605eb52bac5c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE35C 5484 bytes
font_01_sfnt_off0000f5fe.bin
c1af61d71f701a68d5bac861118b8e24585c9b6d7a3d5d7bbd3f9904759002da
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FE 11256 bytes
font_02_sfnt_off00011c7c.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7C 4324 bytes