Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f26816f3bb0c20…

MALICIOUS

PDF

87.7 KB Created: 2021-02-25 19:13:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4eef6f0881e33e3e8610a30ca2da08c3 SHA-1: aa21691b3d5843c497cf0c838a251648839b0b88 SHA-256: 46f26816f3bb0c2066bdfb7710a2f4a315b31d7d4534bc16d7c3d9362e763dc3
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded external URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. The document body is heavily obfuscated, suggesting an attempt to hide its true nature. No scripts were extracted, but the presence of external URIs and the overall malicious verdict strongly indicate an attempt to redirect the user to a malicious site.

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://leonvi.ru/strik?utm_term=vox+ac15+head PDF link annotation
    • https://cdn.sqhk.co/nobutowug/JNzjdjh/gatozazaruvone.pdfIn PDF document text
    • http://dreamingdeveloper.com/187425704567bm9w.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/id5udl1/xikasirosopewawelir.pdfIn PDF document text
    • http://unreguezff.rest/758058628522vwa8.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/2gig_change_master_code.pdfIn PDF document text
    • http://nuzabokazovuwa.iblogger.org/22843750157.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/past_perfect_present_perfect_exercises_with_answers.pdfIn PDF document text
    • http://lopozodedawap.22web.org/limopu.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/duzilobasujefasasepuwijo.pdfIn PDF document text
    • https://cdn.sqhk.co/bikuloxisage/MgehjIX/21738820181.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/tabla_de_verbos_en_ingles_regulares.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/worksheets_for_grade_2_reading_comprehension.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/fibofojeridexulojolu.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/map_of_the_world_with_country_names_and_capitals.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/ropoxedofuleka.pdfIn PDF document text
    • http://berifukozek.rf.gd/fifokumaru.pdfIn PDF document text
    • http://fobupozomorefiw.epizy.com/vadepemejojexexir.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://www.gnu.org/licenses/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000f154.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF154 13252 bytes
SHA-256: 61914f744699ca9a22261ec74e479507329cd04e887b6c606bd9b15d9a3aeca9
font_00_sfnt_off0000e089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE089 4928 bytes
SHA-256: b04880b339198255bfa453636205061021bb19f0957cc41912969aa57f7cd096
font_02_sfnt_off00011628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11628 11124 bytes
SHA-256: 2c859f46565f98e2f455b6d128e47e223cbbef18fbefbb838698b98bae344870
font_03_sfnt_off00013c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C17 16216 bytes
SHA-256: bf13900e28cb1d1a335440cc7e9ee212d64002b8207505a2a5edc1e5590be4e6

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