Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a1c53e1d37ac84…

MALICIOUS

PDF

70.4 KB Created: 2021-03-28 19:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 947d814ef77df58a363990defdf34ed8 SHA-1: 2a8c78784e66ba2fdb112e509c96da576647fd46 SHA-256: 68a1c53e1d37ac840848da6b3123c6621a316397011b33e37fdc6d94eb7af28a
96 Risk Score

Malware Insights

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

The sample is a PDF file that contains numerous embedded URLs, with the primary one being a lure for a fake download. ClamAV and ML classifiers indicate maliciousness, and the presence of external URIs suggests an attempt to redirect the user to a malicious site. No scripts were extracted, but the PDF structure itself is used to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://botokaw.ru/strik?utm_term=ochem+2+for+dummies+pdf
    • http://raxewaponoxiv.mygamesonline.org/who_moved_my_cheese_book_club_questions.pdf
    • http://parrrtner.xyz/aircrack-ng_install_linux_mintbllwf.pdf
    • https://cdn.sqhk.co/kafosine/gfjd2hd/93811120216.pdf
    • https://nagopajasire.weebly.com/uploads/1/3/4/3/134311949/devuroj_wifogime_xixoditew_sotuzaginoxad.pdf
    • http://dwatches.site/judamowarefuecyic.pdf
    • http://zinifezabi.iblogger.org/73175580710.pdf
    • http://vanlit.ru/arifureta_light_novel_volume_7ts632.pdf
    • http://efarbok.xyz/sha256_checksum_windows_10zzwt4.pdf
    • http://chategratis.online/carry_on_luggage_rules_southwest8czi7.pdf
    • http://sendgrid-de.com/the_game_movie_neil_strauss_imdbi65o4.pdf
    • http://akmurzina.com/17782864607yc6y6.pdf
    • http://trysalon.xyz/subojo0cjge.pdf
    • https://cdn.sqhk.co/lijumifi/djdIxZ1/cisco_firepower_ngfw_data_sheet.pdf
    • https://cdn.sqhk.co/kivipemo/CsqibHb/duzibadufefubonatamarukez.pdf
    • http://wetimot.22web.org/62710151696.pdf
    • https://cdn.sqhk.co/kofelejezem/juEjjUw/battle_shooting_game_apk.pdf
    • http://kebilosudo.22web.org/33468934648.pdf
    • https://duturakesubepa.weebly.com/uploads/1/3/4/7/134703065/zibomiwatuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://zuzenif.rf.gd/surface_pro_3_pen_annotate.pdf
    • http://kosezofejesuxef.atwebpages.com/71451870483.pdf
    • http://torejejowomu.myartsonline.com/femuxugolij.pdf
    • http://sodowurivav.onlinewebshop.net/lerojobajexijivovanejulor.pdf
    • http://kezuxitejapub.epizy.com/addition_worksheets_for_2nd_class.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_off0000c84a.bin
2ce7674c3d944fbfc39ec70d32fabfa63df44dfbeff2175667a183edef7c98ca
pdf-font-stream PDF embedded font (sfnt) at offset 0xC84A 5008 bytes
font_01_sfnt_off0000d951.bin
42875bf2f60b343124d56738acc9cb64d2f5963f605e9bb0be2ccc6bb5af114a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD951 10324 bytes
font_02_sfnt_off0000fc9d.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9D 4324 bytes