Malicious PDF — malware analysis report

Static analysis result for SHA-256 50df2a492bbdc335…

MALICIOUS

PDF

71.2 KB Created: 2021-02-09 11:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 54b3b4a202c709df8d3c866b4fb94a8f SHA-1: 67a114e37f42000048a1e4eaeb27a1bff2105054 SHA-256: 50df2a492bbdc3353b781bd99b8a7313889785d93429c912874f99cfb77438ae
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 URL that, when clicked, leads to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to a budget report, aligning with phishing tactics.

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://druttle.ru/wb?keyword=fortnightly%20budget%20report PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409797/normal_5fed46465ea20.pdfIn PDF document text
    • http://acgmgroup.ru/makkar_ielts_writing_task_2_2020v7ob7.pdfIn PDF document text
    • http://teragoronowaki.iblogger.org/bollywood_dance_songs_2017_free.pdfIn PDF document text
    • http://nikaold.site/suxegukcnv5.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/pYK5Rge/bukekamakixabibajamif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_600fbb17514a9.pdfIn PDF document text
    • http://lisifakus.66ghz.com/girl_guides_uniform_ebay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383467/normal_5fefc5f9b9907.pdfIn PDF document text
    • http://artelamp.store/14122054890ci8x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463298/normal_5ff94247cbcf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488137/normal_5ffeb9a5906f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499958/normal_5fcd64b4a82e7.pdfIn PDF document text
    • http://instapodarok.site/lcd_led_or_plasmavanvl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368770/normal_5fef6022ae256.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nujudibixixiri.rf.gd/aap_se_mausiiquii_full_movie_song.pdfIn PDF document text
    • http://bonitadobizaw.epizy.com/origine_des_coliformes_fcaux_dans_l_eau.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/android_java_bufferedwriter.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/nitibativewubab.pdfIn PDF document text
    • http://tofarogupa.rf.gd/vimagujozerixuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/best_android_animator_app.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB22 5032 bytes
SHA-256: 575ac3ffa1afa7588844371109e0f93d8fdf4a2c83ac9ecfa7b3b1198a55fd89
font_01_sfnt_off0000ec3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3E 10496 bytes
SHA-256: 2af4725fb78777e2859acd671ac91543009d3a063e82fee55750025051edeaf3

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