Malicious PDF — malware analysis report

Static analysis result for SHA-256 10d0a01b2629cdd0…

MALICIOUS

PDF

151.6 KB Created: 2021-03-30 10:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d63b0882ba7b404c9a31d88a202b16a SHA-1: dd6456ac24aeafa07f8bb57e8a81d77966344e01 SHA-256: 10d0a01b2629cdd0f48511692f3e540094cdd78072a3b0077653a0474e7a013c
136 Risk Score

Malware Insights

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

The file is identified as malicious by a ML classifier and ClamAV. It contains an embedded URL that mimics a search query for educational material, likely as a lure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be part of a multi-stage attack involving a password-protected archive. No scripts were extracted, but the presence of embedded URLs and the phishing lure indicate a likely attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/award?keyword=aprendizajes+clave+5+primaria+pdf
    • https://cdn.sqhk.co/bupewazadufa/pjfRvhj/online_photo_editor_remove_background_transparent.pdf
    • https://cdn.sqhk.co/sixerusesebu/iMKijgj/wawum.pdf
    • https://cdn.sqhk.co/vadetegubufo/hjxhijh/sawefukubadadevofunimafi.pdf
    • http://pazifelurup.medianewsonline.com/do_hansel_and_gretel_die_in_the_original_story.pdf
    • https://cdn-cms.f-static.net/uploads/4402933/normal_605667dbb55de.pdf
    • https://cdn.sqhk.co/nuzitomizaj/d6Cjfut/peboparawinu.pdf
    • https://static.s123-cdn-static.com/uploads/4369905/normal_5ffd6c7e12a88.pdf
    • https://cdn.sqhk.co/xozirijor/5sihjee/zudusubu.pdf
    • https://cdn.sqhk.co/xamowizaso/jfheijf/football_score_sheet_template.pdf
    • https://cdn.sqhk.co/mamidusidozu/hcEjfhd/per_anhalter_durch_die_galaxis_film.pdf
    • https://cdn.sqhk.co/rujuwawuju/jcRiegi/facebook_marketplace_central_nj.pdf
    • https://cdn.sqhk.co/sivadapexiri/eiDKQiM/offroad_4x4_car_driving_mod_apk_revdl.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tetofamuxulil/block_mania_game.pdf
    • https://s3.amazonaws.com/leteraxewe/xagukatipilimulil.pdf
    • https://s3.amazonaws.com/zidenigad/pulsar_220_images.pdf
    • https://s3.amazonaws.com/vonutavekip/fossil_wyvern_guide_osrs.pdf
    • https://s3.amazonaws.com/salosibejodod/music_equipment_rental_contract_template.pdf
    • http://bepolujogox.atwebpages.com/thermo_king_apu_memphis_tn.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e164.bin
0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E164 6744 bytes
font_01_sfnt_off0001f24b.bin
d9ea0862129c008f9b7becccd4411ffcb11ccd9286341caa959afc57bca518f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F24B 5600 bytes
font_02_sfnt_off00020556.bin
2b17894289ef4ac549ca5ccbfe538e6ebde94701791c0542cba9a71f2d67f349		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20556 2268 bytes
font_03_sfnt_off00020f69.bin
1c5936ec70db697d6b096b54736d31e222d960640d284a3cbed4fb580bdb9948		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20F69 12888 bytes
font_04_sfnt_off00023902.bin
159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23902 16140 bytes

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