Malicious PDF — malware analysis report

Static analysis result for SHA-256 f361f1476d9585a5…

MALICIOUS

PDF

77.0 KB Created: 2021-02-23 16:24:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 74ebb8dd5225dc66d9204b8b02b22d8c SHA-1: 8a8607d74e5d8b3683ad55ca052153b912150587 SHA-256: f361f1476d9585a54c7e0b67073ab6daff8e763e79284a0d6dde6415c93c308c
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a site offering a cracked version of 'Plague Inc.', suggesting a social engineering lure to trick users into downloading potentially harmful software. No scripts were extracted, but the presence of the malicious URL and the ML/ClamAV detections strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=plague+inc+full+unlocked+1.9.1+apk PDF link annotation
    • https://cdn.sqhk.co/nizivatitogu/ggeJcPq/dental_assistant_salary_per_hour_in_sc.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/1ahdCgh/gupem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419204/normal_600cde04d01ef.pdfIn PDF document text
    • https://cdn.sqhk.co/vozedolurezu/jWh8ifB/dash_color_run_st_lucia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462352/normal_601212a9364c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453721/normal_601cf70463a00.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/Dh36xib/xogunaxesevigituva.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/cCugfji/xujufunolitezo.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/mhajihg/4819502181.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381287/normal_600481897e7cd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://barirenuvekesup.epizy.com/gerd_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/zazubidedalafejalubuwifen.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/tsc_annual_leave_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/important_abbreviations_related_to_computer.pdfIn PDF document text
    • http://gulesovel.epizy.com/population_genetics_lab_report_discussion.pdfIn PDF document text
    • http://jafesok.epizy.com/9329772765.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/biohacking_sleep.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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6F 5352 bytes
SHA-256: 0392cadcd6831a82cfed0da3bd0a7f64106db48aa7f3b2e66f327fce8d9dac3a
font_01_sfnt_off0000edd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD0 10528 bytes
SHA-256: ab4d66917b72b4fbe41f6f63cda6f1eba6703ce29430e40169576c0dbdae185c
font_02_sfnt_off000111f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F5 16060 bytes
SHA-256: df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210

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