Malicious PDF — malware analysis report

Static analysis result for SHA-256 908725ff5fc6e351…

MALICIOUS

PDF

77.8 KB Created: 2021-04-01 18:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32cb524bce0d780f8337a28a1a512df9 SHA-1: ae3fcb4284a9da345acda1eeeb357d3e1b41e8aa SHA-256: 908725ff5fc6e3516069753ade860079df3c76347b02c1eb355238339d905f23
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to blood pressure monitor calibration, directing the user to a suspicious URL. ML classification and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the embedded URI is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=how+to+calibrate+a+blood+pressure+monitor
    • https://suzazega.weebly.com/uploads/1/3/4/4/134476369/zajugivafes.pdf
    • https://static.s123-cdn-static.com/uploads/4451542/normal_5fe527fe30b17.pdf
    • http://wisecredit.info/zemixibififibawelisazu8sdfq.pdf
    • http://dorightschool.com/82442276551ffrd2.pdf
    • https://jeregixir.weebly.com/uploads/1/3/1/3/131381720/5351709.pdf
    • https://dotaterezisal.weebly.com/uploads/1/3/4/7/134771172/8770589.pdf
    • https://xemupawiked.weebly.com/uploads/1/3/4/3/134321325/7b262ab02e0.pdf
    • https://detajukizupen.weebly.com/uploads/1/3/4/7/134704356/1251045.pdf
    • http://ruszaimclub.ru/gujopofukolobuxizadju5h8.pdf
    • http://filuniguwol.22web.org/bone_broth_diet.pdf
    • https://vobelorigod.weebly.com/uploads/1/3/4/0/134096073/bikapotajaluden.pdf
    • http://tujodugugejime.22web.org/the_biggest_loser_fitness_program.pdf
    • http://ponopawux.iblogger.org/bde_full_form_and_meaning.pdf
    • https://cdn-cms.f-static.net/uploads/4387814/normal_603c25416131c.pdf
    • http://luxabedeluzop.iblogger.org/manual_de_aguacate_hass.pdf
    • https://cdn-cms.f-static.net/uploads/4414688/normal_603de30c531d6.pdf
    • http://gonzo-3d.com/43071990287n2sg6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/navoburarovada/good_morning_photo_love.pdf
    • https://s3.amazonaws.com/napejaxosinages/sigovos.pdf
    • https://s3.amazonaws.com/zabejuvijolu/blastocyst_formation_in_human.pdf
    • https://s3.amazonaws.com/furunumaroxun/manual_changeover_switch_box.pdf
    • https://s3.amazonaws.com/takebemanijewok/faniza.pdf
    • http://jabenesejamuji.rf.gd/argosy_desk_manual.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_off0000f296.bin
a8b955f03d09c249058ae04ab515859b2eff7278318de12bb23f40803cf0620a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF296 5412 bytes
font_01_sfnt_off000104ed.bin
50debbbfc4acbe3ee098bf9da941d1c11536b5261e42be7ff3589158ae70fbc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x104ED 10804 bytes