Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa3e1dd34eedec1…

MALICIOUS

PDF

84.8 KB Created: 2021-03-27 11:17:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9094eee90597b7be7542a9192c38966 SHA-1: b4230a4a47a95424b563644905056cb5243babb3 SHA-256: bfa3e1dd34eedec177cd48995dae911eb01bfcdaf588ee865113c54671985ac2
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains keywords related to dental erosion, suggesting a lure to disguise the malicious intent. The presence of embedded URLs indicates an attempt to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/award?keyword=atricion+abrasion+y+erosion+dental+pdf
    • https://cdn.sqhk.co/kunimanujage/bibhe9o/30019928870.pdf
    • https://cdn.sqhk.co/menigopas/ijz7qmP/dual_citizenship_ireland_benefits.pdf
    • https://cdn.sqhk.co/kelulegawi/jHhj6hd/gijezidevamiziluvakol.pdf
    • https://cdn.sqhk.co/kafekata/heY8heP/best_free_music_videos_apps.pdf
    • https://cdn-cms.f-static.net/uploads/4487626/normal_6043bd112f3b0.pdf
    • https://cdn.sqhk.co/tiviluluje/hbggqgg/injustice_2_characters.pdf
    • http://fesotisifofil.mygamesonline.org/pack_n_play_mattress_pad_walmart.pdf
    • https://cdn.sqhk.co/kizajituxab/iYjdRvV/19353495196.pdf
    • https://cdn.sqhk.co/numovasovev/BmgjtiS/united_microelectronics_corp.__umc_stock_price.pdf
    • https://static.s123-cdn-static.com/uploads/4485442/normal_5feb5dc300447.pdf
    • https://cdn-cms.f-static.net/uploads/4469353/normal_601ac531c47b9.pdf
    • https://cdn.sqhk.co/gadewekunel/I7ge8ja/mushroom_wars_2_best_heroes.pdf
    • http://mebevevi.mywebcommunity.org/polarity_index_of_solvents.pdf
    • https://cdn.sqhk.co/wudajelu/djjwU1R/two_dots_scavenger_hunt_answers_july_2020.pdf
    • https://cdn.sqhk.co/latosagax/iihehdS/crusaders_quest_best_heroes_2020.pdf
    • http://bagesopabiwub.scienceontheweb.net/the_secret_book_of_john_apk.pdf
    • https://cdn.sqhk.co/vutowogipu/eFSZiNK/42470561397.pdf
    • https://cdn.sqhk.co/sojetaji/jgjhZJ2/49246300958.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dalava/we_the_kings_sad_song_meaning.pdf
    • https://s3.amazonaws.com/gurupixabogivaz/why_is_the_first_and_second_estates_be_opposed_to_change.pdf
    • https://s3.amazonaws.com/wusone/wuberajovizadaw.pdf
    • http://gevejonitu.onlinewebshop.net/898508564.pdf
    • https://s3.amazonaws.com/dikobepibelun/concussion_return_to_play_protocol_form.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_off0001040b.bin
0727529401fe802ed9d02ac4b3bed84f53da9d0a5838f1dab7fe2f7579417e88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1040B 1696 bytes
font_01_sfnt_off00010c35.bin
8f1d788a42e74962539615c50f156b705bc52661208161fb1fd2b9021ec1345f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C35 5380 bytes
font_02_sfnt_off00011e93.bin
b854cdfa76a53658d1d055a1fa3895662b5739fdaeb54f30735261bb2240ebb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E93 11292 bytes

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