Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b432dd534f63ad0…

MALICIOUS

PDF

70.4 KB Created: 2021-02-17 02:02:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fde99bf1930bd1be974bcea1e47b0601 SHA-1: dfcbaba4d78c2b0e59be96b1833badbdad830dfe SHA-256: 1b432dd534f63ad09b80b15594cfac9ea940de6b4d9476c271fdbda54fee97e1
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, such as 'https://druttle.ru/aws?utm_term=bostitch+sb+1850bn+manual', suggests an attempt to redirect users to potentially harmful sites. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=bostitch+sb+1850bn+manual PDF link annotation
    • https://cdn.sqhk.co/nuwezomu/bjczop9/best_rock_songs_about_lost_love.pdfIn PDF document text
    • https://negapisege.weebly.com/uploads/1/3/4/6/134635707/zuzab-gopel-furatejoduzu-tenabus.pdfIn PDF document text
    • http://copyrightprivacy.site/revenge_of_stickman_warriors_apk_modflnnz.pdfIn PDF document text
    • https://cdn.sqhk.co/duziketopefi/luje2UY/vigisowemitorupukepom.pdfIn PDF document text
    • https://cdn.sqhk.co/gekobegij/PBjg3w9/all_dth_recharge_dth_recharge_app.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/jjggArG/sadejorifo.pdfIn PDF document text
    • https://cdn.sqhk.co/venitalobeni/gjicshg/zopaga.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/hjfvjaX/goveratir.pdfIn PDF document text
    • https://cdn.sqhk.co/rumobotituda/sjaAJgj/black_total_launcher_theme_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/KjemIf9/riwixoxunolelekejikulu.pdfIn PDF document text
    • http://solapp.xyz/vabadilirawj9ykk.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/7467310.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/jegamivigakavunibatiwutaw.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/61551078139.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/kalusonuv.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/16451223373.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/tapekule.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A4 5408 bytes
SHA-256: 762b772486394f1750e99e45829f6738967705f55ff1131a13b319ef47e1d251
font_01_sfnt_off0000dbdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDB 10092 bytes
SHA-256: 99977b5db074ec083cd1844dcca662cad2f4588a03079957cebcbcf48d250432
font_02_sfnt_off0000fe4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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