Malicious PDF — malware analysis report

Static analysis result for SHA-256 3deb0ef1effc8c3c…

MALICIOUS

PDF

76.1 KB Created: 2021-03-14 15:57:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a554f9fc455f7bb9fe5f0cf1fbff5f50 SHA-1: 995c7fe2d2c48933d7a66204b8b24652bbcd23f9 SHA-256: 3deb0ef1effc8c3c0102dd8389a7c9ad5734394a438814bbd9c9a9be64a72329
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and ClamAV as malicious phishing content. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain keywords related to the lure, suggesting an attempt to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/123?utm_term=punjabi+wedding+dance+songs+free
    • https://static.s123-cdn-static.com/uploads/4477369/normal_5fceeed035a6d.pdf
    • https://cdn.sqhk.co/lojavowi/Fhigcjb/byutv_app_for_samsung_smart_tv.pdf
    • http://czecheducation.space/roxemovewulafomiweqvnv7.pdf
    • http://karnaval.host/1597692446851kq1.pdf
    • https://static.s123-cdn-static.com/uploads/4366646/normal_5ff16858a78eb.pdf
    • http://juwupexutaval.mywebcommunity.org/all_the_bright_places_movie_rated_r.pdf
    • http://wopizup.mypressonline.com/is_first_aid_biochemistry_enough_for_step_1.pdf
    • https://cdn.sqhk.co/wevafixap/ififR66/sogesak.pdf
    • https://cdn-cms.f-static.net/uploads/4424637/normal_60450444ac341.pdf
    • http://liberum.sportsontheweb.net/ancient_christian_commentary_on_scripture_free_download.pdf
    • https://cdn.sqhk.co/fewukise/hfhaghi/41010214420.pdf
    • https://cdn.sqhk.co/wofosinewok/TxF9geF/lingo_games_learn_spanish.pdf
    • https://cdn-cms.f-static.net/uploads/4425737/normal_5fd2250a75842.pdf
    • https://static.s123-cdn-static.com/uploads/4366952/normal_5ff1f0da390bf.pdf
    • http://devuweza.scienceontheweb.net/anemia_drepanocitica_en_embarazo.pdf
    • https://static.s123-cdn-static.com/uploads/4383160/normal_5ff56410cf26c.pdf
    • https://cdn.sqhk.co/wepugozotap/70lcEhd/ping_pong_challenge_board_game.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://tiwatimab.atwebpages.com/tl-wpa4220_quick_installation_guide.pdf
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_945f734ac00340d4b1d4e79c56c71028.pdf?index=true
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_510bac38e48d4bcfbbcbf2a897f36edc.pdf?index=true
    • https://275320ff-96dd-455a-9699-a0fdc58b27a5.filesusr.com/ugd/943725_0affd34535da4addb9097cb4bbcbd8f1.pdf?index=true
    • 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_off0000ded1.bin
5a789cc88878de4221227c646fa7892636d493f2580192cdd675b7ce6590dc9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDED1 5268 bytes
font_01_sfnt_off0000f0cd.bin
9a9a00aa67324602f74b8ffd5863dae20ab4a54532972bf812c8398f9650f893		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CD 10164 bytes
font_02_sfnt_off000113a3.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113A3 4324 bytes

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