Malicious PDF — malware analysis report

Static analysis result for SHA-256 47cba596dcc9798d…

MALICIOUS

PDF

78.8 KB Created: 2021-04-06 17:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cf67efdced58f13fed9aaba138a3ac6 SHA-1: d325d903c45a660508a0168e7c831c9f5ab30635 SHA-256: 47cba596dcc9798d7a1220e222d3331a6cc01cce383f6d946fb982007ea30bf8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by a machine learning classifier and ClamAV, with the latter detecting it as a phishing trojan. The embedded URLs and document body suggest a phishing lure, presenting itself as a search result for a specific PDF title to entice users to download it. The primary attack vector appears to be social engineering via a malicious document.

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://druttle.ru/wix?keyword=biedermann+und+die+brandstifter+pdf
    • https://static.s123-cdn-static.com/uploads/4444866/normal_5ffbb701c994e.pdf
    • https://zifokodogip.weebly.com/uploads/1/3/1/3/131398222/6638734.pdf
    • http://kartaidatodemeleri.com/61558643318zf6yz.pdf
    • https://zujefimobob.weebly.com/uploads/1/3/1/4/131453463/391df1f.pdf
    • https://cdn.sqhk.co/seseniluvus/ggcggvS/kinokibatesawobojurawagej.pdf
    • https://fotelosalif.weebly.com/uploads/1/3/4/4/134463398/dekedepikuzasi_veroda.pdf
    • https://cdn-cms.f-static.net/uploads/4490542/normal_60513d7e1e727.pdf
    • http://lofitner.buzz/robin_hood_movie_1991_parents_guide1ljjt.pdf
    • http://dixagodal.iblogger.org/madaxiwovuxexonepi.pdf
    • https://cdn-cms.f-static.net/uploads/4401505/normal_606314173dbee.pdf
    • http://littlenat.space/chronicles_of_darkness_character_sheet_mr_gonenkard.pdf
    • http://xrootunited.com/reglas_de_acentuacin_agudas_graves_y_esdrujulas_y_sobresdrjulassyhnw.pdf
    • https://cdn.sqhk.co/tegatiwuwax/pgifSie/dragon_blazer_mens.pdf
    • https://cdn-cms.f-static.net/uploads/4451208/normal_602962411cd8a.pdf
    • http://generatorsale.ru/how_to_update_sct_livewire_tsq017j.pdf
    • http://karavav.iblogger.org/adobe_acrobat_standard_dc_windows.pdf
    • https://cdn-cms.f-static.net/uploads/4473375/normal_602bab5fd1a83.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wezekopufoj.rf.gd/fixed_asset_management_research.pdf
    • http://fuzonojidufube.epizy.com/pixuzigaresetu.pdf
    • https://uploads.strikinglycdn.com/files/9283dbb2-f3df-4312-85d9-7984ab717771/beethoven_5th_symphony_piano_sheet_music_easy.pdf
    • https://uploads.strikinglycdn.com/files/9e7e6021-31d8-4ee3-83b5-0c5dc17db859/how_to_simplify_a_ratio_of_factorials.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_off0000f1fd.bin
729c789964cb02cd50cac4bcaa396f7caf57194e26fe93400dfb7ea2acefc751
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FD 5344 bytes
font_01_sfnt_off00010404.bin
935e75079979d8a63a1bc2f0ca7f4d6e0cdbad422fec99b4cd9dd4b1238923c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x10404 12328 bytes