Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a302748177e1ef8…

MALICIOUS

PDF

77.1 KB Created: 2021-01-24 03:00:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 60076c1abc732113b939adefb8f6176a SHA-1: 3c7ea8007312334d6b6abfcb5271a6c013e14fec SHA-256: 9a302748177e1ef8e081c4a34047c56c68e4d22248e97e3730327dad986b8a0e
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. It contains an embedded URI pointing to a suspicious domain, which is likely the primary payload delivery mechanism. The document body, though heavily obfuscated, suggests a lure related to 'dermatitis atopik dewasa pdf'. No scripts were extracted, but the presence of an external URI strongly suggests a phishing or malware download attempt.

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/aws?utm_term=dermatitis+atopik+dewasa+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386095/normal_5fcbadb89bd9e.pdfIn PDF document text
    • https://pulatufulufu.weebly.com/uploads/1/3/4/6/134610330/kesikewuw_kawufal.pdfIn PDF document text
    • http://zavudonalu.66ghz.com/cg_police_syllabus_2018.pdfIn PDF document text
    • https://daniwevuwawudo.weebly.com/uploads/1/3/4/8/134849628/mijetafiv_notij_tinurasafita_muzegiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443801/normal_5fca7485ad43f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470703/normal_5fe8b4c1ba903.pdfIn PDF document text
    • https://woremudof.weebly.com/uploads/1/3/4/7/134701645/2421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490129/normal_600cb86fb2acd.pdfIn PDF document text
    • https://zexejofamimow.weebly.com/uploads/1/3/1/4/131438337/a7930c75eda2b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466379/normal_5fde59cc6a34a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368477/normal_5feff98f72b46.pdfIn PDF document text
    • https://kajovagej.weebly.com/uploads/1/3/4/7/134747054/d30ad11dcb.pdfIn PDF document text
    • https://derufobi.weebly.com/uploads/1/3/2/6/132682106/9fc98e4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462980/normal_5fe490609d00b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zorogeloma.epizy.com/android_emulator_linux_mint_17.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/brazil_visa_application_form_for_nigeria.pdfIn PDF document text
    • http://lugavatakavupo.rf.gd/91313912469.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/god_bless_america_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/pidudiwoxumenufika.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_off0000f1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FA 5308 bytes
SHA-256: 4e60d6bc0a86b8a19964bd975fe3fcd7f5bad851af00f44ddc34953df8446b5a
font_01_sfnt_off00010409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10409 10160 bytes
SHA-256: 541860deefb36d8c4116f9ebc6604113aa699f1215757f45a01b71820426f3ea

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