Malicious PDF — malware analysis report

Static analysis result for SHA-256 5062892130ede9ce…

MALICIOUS

PDF

85.0 KB Created: 2021-08-19 04:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9767be352447bec1d4efbd553533ef2b SHA-1: dc30cd25f82f4a3e3a05c71433d239ba2544d9d8 SHA-256: 5062892130ede9ce03f41b8ed915f8729189d8dc1423be134714d4303198f742
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous external URIs and link farm patterns, indicating an attempt to redirect users to potentially compromised or malicious websites. The presence of multiple PDF link farm heuristics suggests a deliberate effort to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/uplcv?utm_term=notas+musicales+de+flauta+dulce+tapion+completa PDF link annotation
    • http://dztechfin.com/upload/file///xunezulosovudemixisux.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/57125535651.pdfIn PDF document text
    • http://fygl.net/uploads/file/260722259921.pdfIn PDF document text
    • http://tokyo-sanritsu.com/userfiles/file/75286620248.pdfIn PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210627115053.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f11bd2487---59106085097.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160722b7ce8f25---puwurofigukasimap.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021052507483347.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/refiwituw.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c8b805c22---fegozabexitopedivow.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/d56a710f61fcc85ddb190281c1728a26/mopimukebofidofusa.pdfIn PDF document text
    • http://kisito.com/userfiles/file/1816763212.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/4846853af8b166dbd9faae14242340de/napefepetevetinoloxi.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/72622323236.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/47fc33e8e6eea30523db9337c2febc53/zibokapoge.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3f7024b3b---52479042173.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/wetozuba.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/90709934249.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c8573f237a4---77682674148.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160815f4533c40---12773348615.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/fifutarixetikixavami.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/7cb26fff3a533533e514a781216ad616/19362577847.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/babemodulepagurepujonot.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/c52193be0bff593d30e569e9c28b181b/xafivazijabinupu.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4aed2bb67---gumerisevugiterenarod.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://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_off0000e5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDB 10756 bytes
SHA-256: 4dd9ac357767a195b0a8cb9cc1e50713ef50a336f7bfc25c671f3ce921a68248
font_02_sfnt_off00011692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11692 18556 bytes
SHA-256: 8c5ebb5a5986d81a41be1036359c838ce273f2f2a7ac33a53b7ea7e24dd54e46

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