Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ece3d8c8e24694f…

MALICIOUS

PDF

197.8 KB Created: 2021-02-11 20:00:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8cae8c274f0739f6aeaabe50d94e5528 SHA-1: b4ab504db6ebe38e903b65ef808a44d803217247 SHA-256: 0ece3d8c8e24694f7924761c512de58f888ce12004ee967b5a1385a52af77c2e
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded link disguised as medical guidelines. This link, `https://druttle.ru/wb?keyword=endocrinology%20guidelines%20aldosteronism`, likely leads to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://druttle.ru/wb?keyword=endocrinology%20guidelines%20aldosteronism PDF link annotation
    • https://pebiname.weebly.com/uploads/1/3/1/4/131453048/bbbf044.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530070/normal_5feb014417d80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418565/normal_601dd91bd1c4a.pdfIn PDF document text
    • http://nuverlites.online/20270046549oool1.pdfIn PDF document text
    • https://jezaxinadi.weebly.com/uploads/1/3/4/5/134597346/panemibuxelad_gigerejumava_xunozibebegir_xubuzakilunaxat.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/wokederuseov6nh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405644/normal_5fe2bf326a225.pdfIn PDF document text
    • https://vopupina.weebly.com/uploads/1/3/1/0/131070761/parigoza-lekiwujikimame-rofapaxifesib-padupivisawegip.pdfIn PDF document text
    • http://domavera.ru/29540515572al3f9.pdfIn PDF document text
    • http://creampiepow.club/apple_music_apple_id_balancen12kl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/xupowimobupi.pdfIn PDF document text
    • http://magikid.epizy.com/50785883062.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/52433248123.pdfIn PDF document text
    • http://ruzojonawa.epizy.com/malayalam_nursery_action_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/29217785034.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/blockman_go_mod_money_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/komuduxuvinigojusojekezam.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/amazing_fonts_free.pdfIn PDF document text
    • http://sonasekofuxix.rf.gd/11519337178.pdfIn PDF document text
    • http://soxixebupi.rf.gd/55581350149.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002ae12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AE12 5316 bytes
SHA-256: 2f3f5b467553389fafdb683d9401e7b5c19f68cd97d716a34aea3d19ff3fb733
font_01_sfnt_off0002c01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C01E 14660 bytes
SHA-256: ed10e2bae937746ce577b4d7c955c14af1b4b27b0b11abd5cfc92d0ae064f563
font_02_sfnt_off0002f217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F217 16420 bytes
SHA-256: 24f5434ddb480010bbafe8adaee4ddfeea2ef7727f875a92553cd3affa264f3c

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