Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f85399021d5f0e…

MALICIOUS

PDF

77.2 KB Created: 2021-02-25 06:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25c2da8a2c84d2abb42c473c7692cfe5 SHA-1: 9f88a07b8befee7b5fe94526326bb6dcae59451b SHA-256: 07f85399021d5f0eb787ac0a9246fd6b30dcf11e0fc398bfe8b90a33acb2171e
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to a phishing-related keyword, suggesting a social engineering lure. The PDF structure and embedded content, though heavily obfuscated, are consistent with malware delivery mechanisms.

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://leonvi.ru/wix?keyword=heartcode+acls+patient+cases+answers
    • http://artrosil.xyz/awdhesh_premi_ke_bhojpuri_gana_djpv929.pdf
    • http://idealica-co.site/how_to_connect_zosi_security_camera_to_wifiqp6if.pdf
    • http://axecheat7.xyz/96895703571uvvsw.pdf
    • http://itawegan.fun/rewazedukalopuzodibahns7.pdf
    • http://3bureaureport.info/bulleya_sultan_songsusmuo.pdf
    • http://donbetosstreettacos.com/77496669299uuyf2.pdf
    • http://kigurumi.org/odisha_aso_exam_booksr62sp.pdf
    • http://bit7.top/admin_login_css_template_freek4xmv.pdf
    • http://romeoplanet.club/phthalo_blue_red_substitutesryn8.pdf
    • http://bibuzikufaje.mygamesonline.org/how_to_use_logitech_wireless_keyboard_k400.pdf
    • http://yozi.store/kimirovewiftxlyq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rubidokezive/crying_lady_cat_meme_template.pdf
    • https://s3.amazonaws.com/gofilafixu/muzutofanagoxapafinase.pdf
    • https://s3.amazonaws.com/xufoxorog/47700734872.pdf
    • https://s3.amazonaws.com/posaxugidut/jejazogixemomezukemunoti.pdf
    • https://s3.amazonaws.com/fuwuzerijofa/macaron_template_walmart.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_off0000f267.bin
3d64dd725549ff5fd7a87254654f5af30760b568eea133025e1515c1a2ef2323		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF267 5120 bytes
font_01_sfnt_off000103f0.bin
a739604de6519edd85e3aa461e9db85a2d6d28a362f2bd308d682adc73bcca23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103F0 10376 bytes

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