Malicious PDF — malware analysis report

Static analysis result for SHA-256 43628ceb5b56c61e…

MALICIOUS

PDF

112.0 KB Created: 2021-03-01 17:04:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9412189c42925db30c600dc291a8ae7b SHA-1: 0e03b6f287374e816d0b1143ccfb222c3f3b4268 SHA-256: 43628ceb5b56c61e1277cddbecff1b86e7667a82f7588ac4c5aa8f489f021d2c
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The document was flagged by a machine learning classifier and ClamAV as malicious. A critical heuristic indicates a lure for command execution via the clipboard, instructing the user to paste content into a shell. This suggests the PDF is designed to facilitate the execution of a secondary payload, likely downloaded from one of the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://golowaki.ru/strik?utm_term=eleventh+hour+cissp+study+guide+third+edition+pdf PDF link annotation
    • http://smm-target.ru/ducane_ac10b36_b_manual58lw8.pdfIn PDF document text
    • https://cdn.sqhk.co/mofinopedas/vidoZih/bein_sports_xtra_nisa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495849/normal_603cac2b359b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475716/normal_5ff208fb6d1e9.pdfIn PDF document text
    • https://cdn.sqhk.co/vojazodelud/Whftjc7/pinball_great_best_pinball_game.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/0ihScI1/90013831722.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500893/normal_602149bf1720b.pdfIn PDF document text
    • http://natlab.ru/87004496559kb0uh.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/tHwifot/sipavenigazotivegeg.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/jx4Lhac/seforudasixonobezekame.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/hid5jh6/telusiwum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381752/normal_5ffeeebcf2f0b.pdfIn PDF document text
    • https://cdn.sqhk.co/polidupokasu/fgihiFt/kanto_starters_pokemon_sword.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/mbfoogj/traffic_watch_7_app.pdfIn PDF document text
    • https://cdn.sqhk.co/kadukugobug/xSheBhh/mlb_schedule_astros_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF484 6424 bytes
SHA-256: e637e929042e3978bec96b31b3490ba660419ed310d31d627162007a830036f1
font_01_sfnt_off00010465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10465 5208 bytes
SHA-256: dbfce46da971a8752545f531a3c63bcc3d5de14bbee30c3150ccc7e6174bf537
font_02_sfnt_off00011625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11625 23804 bytes
SHA-256: 873f1a62bfdf7774c3d2ec6f2394740c973b861cffe74c1584b6e61edad8bd3d
font_03_sfnt_off00014fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FBA 14288 bytes
SHA-256: 6afecf4fc0eda3035dbd6940677130261f5e9f81849122898fdbbaa93cfe7042
font_04_sfnt_off00017cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CB6 22132 bytes
SHA-256: 9f74e0382df26b8ab4b05599d529154e7744da2b5dc9a57eb5c99c81eeaaba5d
font_05_sfnt_off00019b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B12 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
font_06_sfnt_off0001a8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8C6 1740 bytes
SHA-256: 5f7498f8e433e4c6c47e8ca53e78f46c92ad2660f1d70c8a76bf58ffa4fc47b7

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