Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1df8b4bc634723b…

MALICIOUS

PDF

80.1 KB Created: 2021-03-09 19:16:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7abfcdbce44c2e5b734cc77a8e1d7fa1 SHA-1: e0eded53cdfa77c40b303725c9c4f8070b3b8106 SHA-256: d1df8b4bc634723b38ed7509cffb70770e63926417f7dbd0488d20e31e5b8641
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that, when clicked, leads to a site offering a download for 'gta 5 apk'. This is a common lure for distributing malware disguised as legitimate software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/wix?keyword=download+gta+5+apk+ocean+of+apk
    • http://jakusavu.sportsontheweb.net/16366922121.pdf
    • http://kifopelidito.mypressonline.com/chick_fil_a_10022.pdf
    • https://cdn-cms.f-static.net/uploads/4406228/normal_5fd29dec5b9bc.pdf
    • http://tarezirok.mypressonline.com/el_juego_de_la_vida_y_como_jugarlo_resumen.pdf
    • http://dokukuke.mypressonline.com/xiromafumexejenow.pdf
    • https://cdn-cms.f-static.net/uploads/4385421/normal_60199729563af.pdf
    • http://zakofuta.66ghz.com/vce_player_for_windows.pdf
    • https://cdn-cms.f-static.net/uploads/4408478/normal_601e5e6dc68ec.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wumurunapaxilar.rf.gd/sat_preparation_classes_in_delhi.pdf
    • https://s3.amazonaws.com/sazomo/8545610959.pdf
    • https://s3.amazonaws.com/mevuzokekenojab/lopirubedax.pdf
    • http://zakefuki.myartsonline.com/technical_drawing_basics.pdf
    • https://s3.amazonaws.com/ponivotigegepub/97343670348.pdf
    • https://s3.amazonaws.com/donake/vovokokupij.pdf
    • http://gumusimigogasuz.onlinewebshop.net/hp_officejet_4500_wireless_driver_mac.pdf
    • http://wejufutaz.onlinewebshop.net/putelazasu.pdf
    • http://tapoloferazuziw.atwebpages.com/doterra_price_per_drop_sheet_2019.pdf
    • https://s3.amazonaws.com/tetenifeme/82024325965.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7fd.bin
f2e725af65b475dd4ab8ca819b242bdc75962310832589e63b36bdf2c71505db
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FD 5328 bytes
font_01_sfnt_off0000fa5c.bin
9476e8fa3f1898d1eadeca6ab6a53043f69793cd5348e99adb9e865bbe15d0f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5C 10208 bytes
font_02_sfnt_off00011d78.bin
fad29a8abb862d580dc6b6a5b49b355c5d8d7da00d33c9192a4c95237ce60960
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D78 16172 bytes