Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bceb3e6bb544328…

MALICIOUS

PDF

96.3 KB Created: 2021-03-19 02:31:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ff18b9df6b9c42e54ca58f91b928805 SHA-1: e4475e380d69e82312f4ee4035995d5b1bd087b1 SHA-256: 3bceb3e6bb5443289ba0751db655dfe427d26512e418d21a51a6f6ecd66e2879
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified as malicious by ML classifiers and ClamAV. The document body, though heavily obfuscated, contains keywords that might be used in a phishing lure. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

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://seumenha.ru/wix?keyword=constant+mesh+transmission
    • http://xokujipi.22web.org/8186247915.pdf
    • http://gedatidigog.sportsontheweb.net/dofalivalefepomekag.pdf
    • https://kopepadozuko.weebly.com/uploads/1/3/4/5/134505487/be6f6fa.pdf
    • http://fexevosekuzavep.iblogger.org/gerudo_valley_sheet_music_flute.pdf
    • http://liwitesuzemumex.sportsontheweb.net/sources_of_the_western_tradition_volume_2.pdf
    • https://kirimobo.weebly.com/uploads/1/3/1/0/131069812/3f73dc3.pdf
    • http://wersita.fun/serta_motion_essentials_3_reviewc8l96.pdf
    • http://milanomoda-italy.site/76028368861vyczd.pdf
    • http://jeruxawi.iblogger.org/56537654105.pdf
    • https://gajodiwu.weebly.com/uploads/1/3/4/0/134042407/dabigokujudoli_pobuko_zijafowokuxifaj.pdf
    • http://jakotiwabelumil.iblogger.org/zegejurupemakajuginup.pdf
    • https://mexakogu.weebly.com/uploads/1/3/5/9/135981712/pugijomelutofusavida.pdf
    • http://ludozikime.22web.org/sotiza.pdf
    • http://reactivaperu-viabcpi.com/jogazobonopuwipugiribegno8uc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://lunufisisosixi.rf.gd/lukug.pdf
    • http://koburolamugalo.rf.gd/jivamenazevuputefekixunot.pdf
    • http://vanepozimor.rf.gd/ketogenic_diet_and_intermittent_fasting.pdf
    • https://uploads.strikinglycdn.com/files/11a338b8-0d79-41a3-a498-10a902e45fd4/wordpress_themes_for_food_blogs.pdf
    • https://uploads.strikinglycdn.com/files/a2982a16-f9e7-45fd-a25e-d898ee3c1540/fowava.pdf
    • https://uploads.strikinglycdn.com/files/d158cea1-1aad-4e26-b13b-41fc560752e3/78953414680.pdf
    • http://luwikomoxure.epizy.com/dulejojitase.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_off00013107.bin
fcf11d490dd38668a28b572bd10827463fa5e9ec6b8d65b20b191385f35e813a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13107 4704 bytes
font_01_sfnt_off000140c1.bin
208389826b4f679d64e45101b5871062a6a2c4c7106a08a38c420561d8a0be6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140C1 11220 bytes
font_02_sfnt_off0001670b.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1670B 4324 bytes

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