Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4c27b764fc03c4e…

MALICIOUS

PDF

79.6 KB Created: 2021-03-16 22:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a77deabcc8a5fde94f02d39fc4d9f72f SHA-1: 52822688191514bc38b1d187f9ef4eb9c211ccbd SHA-256: f4c27b764fc03c4ed63c592041d2af4061fbc5984d76b8c1d3d36dd9139dcc3d
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to be related to a user manual, suggesting a lure to trick users into visiting the malicious URL for potential phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wix?keyword=motorola+moto+g+3rd+gen+user+manual
    • https://kobuwejen.weebly.com/uploads/1/3/0/8/130873730/eea92cd39.pdf
    • https://takibuvekinapix.weebly.com/uploads/1/3/4/4/134456834/be8004546fcf30.pdf
    • http://furofosozunonew.22web.org/fufonizuvopetuxuf.pdf
    • https://cdn-cms.f-static.net/uploads/4495973/normal_6050366fc349b.pdf
    • https://cdn-cms.f-static.net/uploads/4427293/normal_60382fa521c73.pdf
    • https://static.s123-cdn-static.com/uploads/4415327/normal_5fdcf9c42f788.pdf
    • http://kexufiloruruki.22web.org/95104448703.pdf
    • https://lobejimore.weebly.com/uploads/1/3/1/3/131383478/7b3c8d1244dba52.pdf
    • http://ranomurivokav.22web.org/sudelojorenujapasideron.pdf
    • https://static.s123-cdn-static.com/uploads/4406464/normal_5fdeb54f75e16.pdf
    • https://tevipane.weebly.com/uploads/1/3/2/6/132681072/kezupowu_powotumu.pdf
    • https://liwifaxuje.weebly.com/uploads/1/3/0/8/130874244/2f610bf.pdf
    • https://static.s123-cdn-static.com/uploads/4392195/normal_5ff09621d90ca.pdf
    • https://static.s123-cdn-static.com/uploads/4425910/normal_5ffe1b12c89e3.pdf
    • https://lifulufo.weebly.com/uploads/1/3/1/3/131379971/samowoji_zalebagosixi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sazomo/types_of_cells_formed_in_mitosis.pdf
    • http://mawarine.epizy.com/free_compound_words_worksheets_for_1st_grade.pdf
    • https://s3.amazonaws.com/fowonaxul/14118111172.pdf
    • https://s3.amazonaws.com/kaxukok/the_power_of_now_by_eckhart_tolle_summary.pdf
    • http://naxamuj.epizy.com/dutowuru.pdf
    • https://s3.amazonaws.com/jaloto/management_of_hypertension_british_hypertension_society_guidelines.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e561.bin
59701ab6f1a8c012dd8ec870d317e4651c2abf9fe53e1fa5cdcb5946a55c7908		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE561 3724 bytes
font_01_sfnt_off0000f29e.bin
276079af2b144b92276fef7209c288946ea7e80f58a006b7382ad98665da0dec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF29E 5316 bytes
font_02_sfnt_off0001049c.bin
51bd4e1c8b4bddaaee15d4afc2292eef49127a2d726537e64e1f1682e0c8ac07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1049C 13528 bytes

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