Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ace5f7bbdda5f6f…

MALICIOUS

PDF

78.6 KB Created: 2021-04-02 14:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f7df13ffc224d6b12caae328f61893c SHA-1: dc9c250474fbab822b1cdd4405bcf580f27e578b SHA-256: 7ace5f7bbdda5f6f3e45740039750a08ff75cdc3e0ba257bddb00bf4bc92e1a0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'jumiwimov.ru', which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often abused for malicious PDF creation. The presence of embedded URLs and the overall detection score strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://jumiwimov.ru/wix?keyword=us+navy+white+hat+eulogy
    • https://bunonosuvon.weebly.com/uploads/1/3/5/9/135976801/zopakezotux-fejebexididir-miloxunesib.pdf
    • https://cdn-cms.f-static.net/uploads/4411252/normal_601da31657303.pdf
    • http://jukojadijomefar.medianewsonline.com/fagumudomuveb.pdf
    • http://petrol-v-pol-price.site/gujapokimotapobi9x2qi.pdf
    • http://fastcreditcheck.info/aishwarya_movie_songs_kannadaz5e61.pdf
    • https://supeneti.weebly.com/uploads/1/3/2/8/132815050/nubixafu_jagozuruz_kewojixadexusaw.pdf
    • http://gratoraama.space/tan_application_form_formatvjzu4.pdf
    • http://copyrightmediahelp.com/bekukaxopujezusamuleravvuhkp.pdf
    • https://cdn-cms.f-static.net/uploads/4394068/normal_6064a6866de26.pdf
    • http://talakam.space/the_maze_runner_2014_movie_downloadubzo6.pdf
    • http://robot3.site/tripp_trapp_high_chair_review301oz.pdf
    • http://bestcreditcheck.info/45779777270jksua.pdf
    • http://kojijeku.mygamesonline.org/allen_carrs_easyway_to_stop_smoking_amazon.pdf
    • http://xovijezup.mywebcommunity.org/66630038405.pdf
    • http://filemarker.store/takeuchi_tb230_operators_manual70viv.pdf
    • https://cdn-cms.f-static.net/uploads/4392237/normal_604a10b6023f2.pdf
    • http://tb-films.ru/marshall_avt50_valvestate_2000_reviewlpcip.pdf
    • https://cdn-cms.f-static.net/uploads/4495974/normal_6042d043ac316.pdf
    • https://jasadugo.weebly.com/uploads/1/3/5/3/135341750/6908161.pdf
    • https://talusisepekixed.weebly.com/uploads/1/3/4/0/134012470/9674844.pdf
    • https://xutonipojoneri.weebly.com/uploads/1/3/4/6/134667901/visaxupababif-fuvoliso.pdf
    • https://cdn-cms.f-static.net/uploads/4482625/normal_6064f97eeb7e1.pdf
    • http://eferevole.com/93685699721fozfq.pdf
    • http://idealslimitalia-ufficiale.site/517950042820y8ni.pdf
    • http://flowerport.market/kakeb1hkdv.pdf
    • http://lewijufe.sportsontheweb.net/valvulas_del_corazon.pdf
    • http://badoxik.scienceontheweb.net/birthday_invitation_letter_format.pdf
    • http://p-kavkaza.ru/youtube_matter_of_trust_lyrics9z1et.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000f5f3.bin
f8053bd0d2bca9bca4877336b7fed12ee5808e91dd0db18584df50fdf6c83f64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F3 5096 bytes
font_01_sfnt_off0001076d.bin
5afab2acf25c2877c0935a97fe7529a56877f7d0841e22ebb5f1c1ba95fbcbe8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1076D 10936 bytes

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