Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10e984659000225…

MALICIOUS

PDF

101.8 KB Created: 2021-03-03 13:49:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: caeafd5e758b94a54fce52cd95149cab SHA-1: 26b204c1270ec40841fb242ed9c55413d8cf9250 SHA-256: e10e9846590002254b46c49930cbb98945fa4fa6da36447386d972b3a144ef56
136 Risk Score

Malware Insights

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

The sample was flagged by a machine learning classifier and ClamAV as malicious, with a high confidence score. It contains an embedded URI pointing to a suspicious domain, and multiple other URLs were extracted, some of which are associated with PDF payloads. The document body, though heavily obfuscated, suggests a lure related to an exam, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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://ponafet.ru/award?keyword=concrete+thought+process+mental+status+exam PDF link annotation
    • http://maddot.space/jajarezargu5cn.pdfIn PDF document text
    • http://freehookup.xyz/frasi_inglese_utili_per_viaggiaretwexf.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/bgdgfM3/social_media_marketing_free_course_udemy.pdfIn PDF document text
    • http://beststudent.fun/application_of_computer_in_hospital_pharmacyf3lya.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_601392312445c.pdfIn PDF document text
    • http://yazansoft.com/mokixadomwx.pdfIn PDF document text
    • https://cdn.sqhk.co/gixofusofago/ujfcicV/wow_gold_farm_april_2020.pdfIn macro / runtime command snippet
    • https://static.s123-cdn-static.com/uploads/4451955/normal_5fe18d3b5cdc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501804/normal_6028a2ed448cb.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/QjjVgcK/94250579359.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pizivurapab/what_are_decorative_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/why_is_the_brush_on_vacuum_not_spinning_shark.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/ferrari_458_price_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/waworegezolomuponego.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/43731898207.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/posukoneke.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/full_form_of_cmd_college_bilaspur.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/94346680723.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/strikethrough_verb_forms.pdfIn macro / runtime command snippet
    • https://s3.amazonaws.com/mevuzokekenojab/conflict_minerals_reporting_requirements_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/corruption_of_champions_mod_guide.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://s3.amazonaws.com/musoxifuviIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14641 5272 bytes
SHA-256: 63c53012f8ad9715c9c8a4f14ffdad8a677965f25e26303cbba76ba846da6972
font_01_sfnt_off00015803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15803 10288 bytes
SHA-256: 9a85b4401517f4f33bae4d88e7a2a3efc7df0ba21830ade9d993ff1d7c3f6da7
font_02_sfnt_off00017b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B4C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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