Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b3e786f7c357280…

MALICIOUS

PDF

74.2 KB Created: 2021-01-26 10:05:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0da91b761ee7966a565353af93e146aa SHA-1: 90539bad0fbd3d97b3bb36ad7d4bfc0f435282f5 SHA-256: 7b3e786f7c3572805b4fbe2678f7c37ae43930e14a63ef6777db14996ca4cc27
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body contains references to 'Bloons td 4 apk free', suggesting a lure to trick users into downloading unwanted software. The presence of embedded URLs, such as https://bologen.ru/123?utm_term=bloons+td+4+apk+free, further supports the phishing and malware distribution intent.

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/123?utm_term=bloons+td+4+apk+free PDF link annotation
    • https://cdn.sqhk.co/wubunepan/eFgca9k/wekutudexaletidunubawozo.pdfIn PDF document text
    • http://nutupiwerumad.66ghz.com/jumoru.pdfIn PDF document text
    • https://cdn.sqhk.co/pejozujemu/jhGVWie/62444208202.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/1GgdJgj/nrf24l01_pinout_arduino_nano.pdfIn PDF document text
    • https://cdn.sqhk.co/nivopekodi/mgjrFyD/firaxiruputefuvuwonon.pdfIn PDF document text
    • https://cdn.sqhk.co/serojimo/iicO8gh/the_galaxy_survivor_mod_apk_obb.pdfIn PDF document text
    • https://cdn.sqhk.co/xidatelo/Tdhaya6/xasaful.pdfIn PDF document text
    • https://cdn.sqhk.co/sadetujadufi/70RvKLW/82184166514.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
    • http://werexixudi.rf.gd/browser_free_app.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/60580979763.pdfIn PDF document text
    • http://wunozoviwo.epizy.com/bhangra_mashup_dj_lishkara.pdfIn PDF document text
    • http://dojopugoput.epizy.com/go_math_grade_6_reteach_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/96892055812.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/60182909626.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/60498380472.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/18414206225.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/good_clinical_practice_guidelines_gmc.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E3 4976 bytes
SHA-256: 60e4ad3f3b8b450627e364358c9d5a2f74804e7e14357f2a454ac2362f70b097
font_01_sfnt_off0000e7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E3 11004 bytes
SHA-256: 2f32788da1b255fc949d3fbbf657d24bd64be7b1b15e902ee025087610dec019
font_02_sfnt_off00010d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D86 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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