Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf7f1da0ac0c7ea…

MALICIOUS

PDF

69.4 KB Created: 2021-03-17 21:46:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86e56bb0ba38d1f2378220fe7249ac3d SHA-1: 993fa05d0bbec906b68c6e99bb2ad5a54e63ab61 SHA-256: caf7f1da0ac0c7eaec4f551c0f01305d5b0297b72a55559d96847488d85220e1
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to Weebly and other hosting services, indicative of a link farm or malware distribution. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document body contains references to PowerShell commands and suspicious URLs, likely to download and execute further payloads. ClamAV also identified this as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://kuzutuzo.ru/wix?keyword=dirt+the+movie+worksheet
    • https://tewosafaxuw.weebly.com/uploads/1/3/1/3/131379700/sezenajatosewij.pdf
    • http://energierecrute-emplois.com/c_language_basics_notes_in_hindib78be.pdf
    • http://temppicture.xyz/77419777396il0e2.pdf
    • https://zakesulukagog.weebly.com/uploads/1/3/4/4/134493448/garinozerugazegirab.pdf
    • https://cdn.sqhk.co/zuronenom/bgfhhwe/kill_shot_virus_zombie_fps_shooting_game_download.pdf
    • https://cdn.sqhk.co/tamaladafa/Vq1hchc/89738320233.pdf
    • https://xojemejavema.weebly.com/uploads/1/3/3/9/133987363/xixitoxinodilomege.pdf
    • http://ulekschool.online/66951934994rpv2m.pdf
    • https://xavapijiwo.weebly.com/uploads/1/3/3/9/133997403/5200354.pdf
    • https://cdn.sqhk.co/wafasojudo/uiboias/std_10_gujarati_textbook_solutions.pdf
    • https://ginekimef.weebly.com/uploads/1/3/0/7/130738874/8424164.pdf
    • https://cdn.sqhk.co/tamaladafa/Vq1hc
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xifabilejilab/microsoft_powershell_commands.pdf
    • https://uploads.strikinglycdn.com/files/005ba4e2-23d9-428e-bfc9-d8e723079154/asus_rt-ac68u_forgot_password.pdf
    • https://s3.amazonaws.com/jugobimuraje/atip_consent_form_meaning.pdf
    • https://s3.amazonaws.com/gusule/daily_mirror_quizword_and_crossword_answers.pdf
    • https://s3.amazonaws.com/lorifumofelu/financial_reporting_of_environmental_liabilities.pdf
    • https://s3.amazonaws.com/jeworurowam/liwomamadixix.pdf
    • https://uploads.strikinglycdn.com/files/77d133e4-2d3d-49c8-a594-aa22ab0744f5/41276205033.pdf
    • https://uploads.strikinglycdn.com/files/77dfa7f4-4748-4c9f-9dbe-c03a2c957812/46595464606.pdf
    • https://s3.amazonaws.com/vosimalume/altbalaji_app_apk.pdf
    • https://s3.amazonaws.com/kefefetafij/los_medios_de_transporte_terrestre_acuatico_y_aereo.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_off0000d42d.bin
fec2193c614be7bc8efb3b5a199332b9c9c8c3da5714352b090e5a86aeb3df9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD42D 4896 bytes
font_01_sfnt_off0000e4c5.bin
be1d04567fb043ef3a560e67f8a0db8eaccc3713f4920a23dc45cdae792e20c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C5 10332 bytes

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