Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a1b1bfc98c36ba…

MALICIOUS

PDF

109.7 KB Created: 2021-02-13 02:11:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: ca85d9000dc7cc2637e8fecdb5c440d0 SHA-1: 98607e1291f9620c0869e2bcdee9eb1ee8212dc0 SHA-256: 96a1b1bfc98c36ba14935942f43067c719ac99a03f16f63a1cce90a4afe91060
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'druttle.ru', which is likely a malicious domain used for phishing or malware delivery. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'funbrain 360 games', suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=funbrain+360+games PDF link annotation
    • https://zuveravovizopow.weebly.com/uploads/1/3/0/9/130969477/d7b60a7890.pdfIn PDF document text
    • https://labupapem.weebly.com/uploads/1/3/1/4/131406977/siludifepe.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/vhNtdif/jo_candy_shop_bubble_gum.pdfIn PDF document text
    • https://cdn.sqhk.co/naliwanik/ghhhjfB/ice_princess_lily_common_sense_media.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuwegijelo/aGTJ1ge/leapfrog_youtube_app.pdfIn PDF document text
    • https://cdn.sqhk.co/desiruzag/aFLgifg/ceramic_artists_websites.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/werowibovezoje/slope_intercept_form_perpendicular_equation.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/56062358367.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/waruwokopevojorepitolipu.pdfIn PDF document text
    • http://mijikabetabup.rf.gd/uniformity_of_nature_meaning_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/savavugaxisigalexamo.pdfIn PDF document text
    • http://razikonuwivomo.epizy.com/arcgis_engine_developer_kit_10._5.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/84247052963.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/antonyms_and_synonyms_worksheets_3rd_grade.pdfIn PDF document text
    • http://befojarariwowab.epizy.com/7437467593.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_off00017315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17315 5528 bytes
SHA-256: 2935f3cfb27d8035bda86418781d3c024b33c8ca587d6f632acfd93d847adda6
font_01_sfnt_off000185c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185C4 10504 bytes
SHA-256: 2adc83f6d3bef68f6cbb9b23873f235514b432fcd093f42823555b3d3bd8c0ce

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