Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbb4988791b96d49…

MALICIOUS

PDF

81.1 KB Created: 2021-04-13 15:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a116e568237a3ff476d7307979a07c57 SHA-1: 52153f76dc110fe662f93a0b2be0218d8980a829 SHA-256: cbb4988791b96d491825cc28aba8b285f203644f0cc9b81e61556ff631afc3dd
96 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for an external URI pointing to a suspicious domain, and numerous other embedded URLs. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be a lure related to a search query, directing the user to the primary malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/strik?utm_term=will+there+be+a+6th+twilight+book
    • https://cdn.sqhk.co/sulukuxewef/rpgjeMw/happy_new_year_audio_song_free.pdf
    • https://cdn.sqhk.co/pegipoveridi/cuhd5ib/shooting_a_bear_in_self_defense_canada.pdf
    • https://static.s123-cdn-static.com/uploads/4471488/normal_5fe2b43f7b71d.pdf
    • https://static.s123-cdn-static.com/uploads/4475586/normal_5fcc2ea80ac0a.pdf
    • https://cdn-cms.f-static.net/uploads/4368731/normal_604626b266fe4.pdf
    • https://static.s123-cdn-static.com/uploads/4480403/normal_5fe570fc75b70.pdf
    • https://cdn.sqhk.co/jozunufap/jfiaZDP/raees_full_movie_hd_filmywap_2017.pdf
    • https://cdn-cms.f-static.net/uploads/4501965/normal_604b8b3344700.pdf
    • https://cdn.sqhk.co/zexukobesu/hjhdsjj/garesidel.pdf
    • http://wasatosu.sportsontheweb.net/acca_f9_syllabus_2020.pdf
    • http://juzufezike.mygamesonline.org/xetovunuzevam.pdf
    • https://cdn.sqhk.co/revinoxu/owbjjKS/mirtazapine_for_dogs.pdf
    • http://befotuke.mywebcommunity.org/72143296116.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jedaxopopuko/how_to_play_the_electric_guitar_beginners.pdf
    • http://dibirat.rf.gd/63357218420.pdf
    • https://s3.amazonaws.com/nopomewegobij/44154350889.pdf
    • https://s3.amazonaws.com/sikuva/10th_class_pak_study_book_in_urdu.pdf
    • https://s3.amazonaws.com/zalisujezajaje/free_printable_quotation_marks_worksheets.pdf
    • https://s3.amazonaws.com/firigugixujotov/maserati_quattroporte_gts_2020_review.pdf
    • http://wumevagijez.epizy.com/latale_w_treasure_hunter_guide.pdf
    • http://raxajabidadida.onlinewebshop.net/schlage_keypad_door_lock_setup.pdf
    • https://s3.amazonaws.com/belapawerezuju/toro_sprinkler_valve_repair_kit.pdf
    • https://s3.amazonaws.com/jevedijadiki/lapebutuwegufipoxalazaj.pdf
    • https://s3.amazonaws.com/palevijuj/the_metamorphica.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_off0000fe4e.bin
9cffa54758e78bdb22bf56df82a1729c07f49abde74fcf7e4357aa1544c91c62
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4E 5232 bytes
font_01_sfnt_off00011030.bin
e7c5562bdbe475217d945c2232bf9aa01514c4e1f8b8a3a08e559945299fb10b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11030 11472 bytes