Malicious PDF — malware analysis report

Static analysis result for SHA-256 456291eec2ddbd3d…

MALICIOUS

PDF

76.2 KB Created: 2021-03-20 18:30:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3c246e06d4ab39969051043f1fff431 SHA-1: 2422c5f2d6fd64e0c25307456059dffeb2b95fbf SHA-256: 456291eec2ddbd3de2e18ed7c0e4be1ead500003928f511c30eca30daf891903
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to search results, further supporting a phishing attack vector.

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://jacksth.ru/strik?utm_term=stephen+king+books+by+year+written
    • http://complerbnp.com/printable_bubble_answer_sheet_1_10065pyx.pdf
    • http://koolmaxt.online/what_percentage_of_each_hogwarts_house_am_i8q9nb.pdf
    • https://cdn.sqhk.co/giwumazusew/1gfjajc/15325989113.pdf
    • https://cdn.sqhk.co/padasagam/fifkXjf/dinefumugowalabipawik.pdf
    • http://felidefewipikig.22web.org/6221815788.pdf
    • http://pixeburunov.iblogger.org/14416360293.pdf
    • http://pivolirarorip.mypressonline.com/6453615672.pdf
    • http://ributufukepun.66ghz.com/60292028180.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gafedupeba/72998514624.pdf
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_7f2bfdf3783447b1b55a51cbf426a084.pdf?index=true
    • https://s3.amazonaws.com/tufujifinobiro/advertising_flyers_templates_free.pdf
    • http://lewinozed.atwebpages.com/xabowavanalalilixebabubo.pdf
    • http://mafizili.epizy.com/how_to_tell_if_a_redox_reaction_is_acidic_or_basic.pdf
    • https://s3.amazonaws.com/nawuvud/raman_abdullah_tamil_movie_song.pdf
    • https://b913155d-2712-4fd4-bcc6-651970a8c456.filesusr.com/ugd/e39924_0eeb20c0e1234071858c4b1b21ed3c04.pdf?index=true
    • https://83662c7a-80c1-4e94-b5a4-3df479670d58.filesusr.com/ugd/27be29_5dceb1ea64644e5ba9d35ac525842a61.pdf?index=true
    • https://64f3f273-fd79-4cea-bc15-92b2431614e2.filesusr.com/ugd/542254_ab6683c5820b45f5972c5008090a68e2.pdf?index=true
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_e84cf62aba6d4a3b9d8a004b368ff7e0.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebb5.bin
13c459ad1121f8ca1250a03cccaa70cc4c35de8d01bcb1d088ba96fdbc4b87f7
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB5 5552 bytes
font_01_sfnt_off0000fea1.bin
33f857fe1443fbaaa666827f33fde2d25bf5978bfb4ab92e35f37bfe96a6fb1c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA1 10728 bytes