Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc75562a81472969…

MALICIOUS

PDF

87.3 KB Created: 2021-03-13 22:36:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd17b9ece8958efa4138e02bba575ea4 SHA-1: 20088500853242e899f3e22cbcb350fef80b32be SHA-256: bc75562a81472969d27b7cea7a2c09aec86124c01fc58af30e6bef470fb449a9
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a URL that aligns with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=crop+rotation+principles+and+advantages+pdf
    • https://disesusobabetom.weebly.com/uploads/1/3/0/8/130814900/3476954.pdf
    • https://turabebusaweni.weebly.com/uploads/1/3/1/4/131438207/woxazitulezifip-liruwex.pdf
    • http://zaxevef.getenjoyment.net/tetobotavuzalev.pdf
    • http://raketun.22web.org/1197922487.pdf
    • http://kubosikavudux.mygamesonline.org/91460711996.pdf
    • http://forovasax.medianewsonline.com/9675264275.pdf
    • http://fituxem.sportsontheweb.net/tokyo_ghoul_re_kaneki_comes_back.pdf
    • https://siverogafexuj.weebly.com/uploads/1/3/4/0/134012696/4641968.pdf
    • http://gilumesu.mypressonline.com/what_is_critical_theory_in_english_literature.pdf
    • http://veruvipavopa.getenjoyment.net/how_to_repair_washing_machine_that_wont_spin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/994339c7-06b6-468c-9bf2-d346fa194ad3/who_are_the_five_primordial_deities.pdf
    • http://merizipu.rf.gd/big_sean_albums.pdf
    • http://jirabasojexosud.atwebpages.com/physics_1_chapter_2_test.pdf
    • https://uploads.strikinglycdn.com/files/01ba87f4-b6ab-4abf-95e7-b286f78329f6/what_is_image_file_operating_system.pdf
    • http://dabenaguna.epizy.com/ludefizedadurizoj.pdf
    • https://uploads.strikinglycdn.com/files/674e5383-91e0-484b-b48c-2391a23db55a/42281183417.pdf
    • http://tediguku.atwebpages.com/gusate.pdf
    • https://uploads.strikinglycdn.com/files/e3195c1c-ed2b-46a3-8565-a1f1e9b97604/vitamix_blender_sale_bed_bath_and_beyond.pdf
    • https://uploads.strikinglycdn.com/files/807ad165-f848-408e-9d84-e539fd5f54e2/ferrari_california_2020_price_in_uae.pdf
    • http://wubuxosivukip.epizy.com/61453963218.pdf
    • http://rupegofiminatef.epizy.com/blu_ray_movies_2019.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_off0001176c.bin
5386eda40262bc0a6bce3dcbc5388c3db8429c4ac16813db96ba645c5e30a2cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1176C 5288 bytes
font_01_sfnt_off0001297b.bin
831a746445c4dfa683cfd119c21b0dd2966c62ab6ff42dce8daa07d0dcdcf946
pdf-font-stream PDF embedded font (sfnt) at offset 0x1297B 10636 bytes