Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3d6d55b7343901…

MALICIOUS

PDF

80.2 KB Created: 2021-03-23 03:17:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6902e3d0d10da8ef029b9c3fdbc0d6c SHA-1: 2aa4c284d24880b58e88485153b0bed21881575a SHA-256: 9d3d6d55b73439014d0321be20972f9418dbfaf896a35b16e05ea896a8481d73
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, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body is heavily obfuscated, but the presence of external URIs suggests a phishing attempt to trick users into visiting a compromised or malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=venn+diagram+example+2+circles+blank
    • https://static.s123-cdn-static.com/uploads/4425492/normal_5fe412faba6b4.pdf
    • http://wulixiv.sportsontheweb.net/31959530508.pdf
    • http://vakiduweg.mygamesonline.org/viktor_frankl_mans_search_for_meaning.pdf
    • http://nukotim.iblogger.org/biology_textbook_grade_11.pdf
    • https://cdn-cms.f-static.net/uploads/4402289/normal_601e686e34bdd.pdf
    • http://waralolojogeta.sportsontheweb.net/46429776201.pdf
    • http://modozadubop.mywebcommunity.org/22133978009.pdf
    • https://cdn-cms.f-static.net/uploads/4489041/normal_5fe98dbc3d8d4.pdf
    • https://cdn-cms.f-static.net/uploads/4383797/normal_60201966c8a39.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/nupotukig/38947241162.pdf
    • https://4a1fbaa0-0e67-401b-a466-96699e2e5642.filesusr.com/ugd/9647bf_b5309eab5e5d4ab3ad368cbcfc6643c6.pdf?index=true
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_20bfe62f7c63469192015db205be7f78.pdf?index=true
    • https://04a9e765-cf69-4035-9b9a-998d8fb4e692.filesusr.com/ugd/8c5016_9b2ca9991c2949bf935f92c64f9b2b51.pdf?index=true
    • http://jasisogurajis.rf.gd/paragraph_of_the_week_middle_school.pdf
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_7c1b3be3d19744578b9b3cddb2115e81.pdf?index=true
    • http://litufowanukoro.epizy.com/pudenawukojubujunama.pdf
    • http://makakanow.onlinewebshop.net/25111881858.pdf
    • http://bekusisit.atwebpages.com/evenflo_chase_safety_rating.pdf
    • https://s3.amazonaws.com/mefovu/sunbeam_mixmaster_heritage_series_2353_replacement_beaters.pdf
    • https://s3.amazonaws.com/mivokozibu/file_a_police_report_san_diego_ca.pdf
    • https://s3.amazonaws.com/sowewazulejewi/22621155598.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_off0000eddf.bin
eac44ffc333681440fdc8371a1363246baf9da5c92cfcd3269990b2faf465584		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDF 5360 bytes
font_01_sfnt_off0000fff0.bin
33f87afd034a515fefe017cbe9b62ae3ac6435e53685ea953085b98dcef3ebfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF0 10232 bytes
font_02_sfnt_off00012305.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12305 4324 bytes

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