Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4077995c0319de…

MALICIOUS

PDF

70.1 KB Created: 2021-09-15 12:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f001fca741601d0c716f2d9dbf1a5683 SHA-1: 9f1d5462b90238be8298e128766f136469b4cec2 SHA-256: 6e4077995c0319dec083c4cf7a634e0d7085caef2942035531954517d45d8208
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and a link farm pointing to compromised web servers, suggesting an attempt to redirect users to malicious content. The document's structure and URL patterns are consistent with phishing campaigns aiming to deliver further malware or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 70 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/n5csne86q54gg03r0hncrthgc1/dejatilesotatemukunu.pdf In PDF document text
    • https://tavio.ru/files/file/wezetakemiguwisomemebede.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141684d43f7c---63625147786.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/74909504754.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/26397320390.pdfIn PDF document text
    • https://forumsevens.com/images/file/raxipisugapudevi.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/34034382126.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/pifezosugoki.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/kifewusutejojozozenop.pdfIn PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/21431584272.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/68699110782.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/kapigut.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/2diefehpsf8rt2nhi02h73dkfdustr7a/kisumuvujifeb.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/446e7d033e464501cbe103a51748ca44/viborimumimuke.pdfIn PDF document text
    • https://felicityokolo.com/file/13123841963.pdfIn PDF document text
    • http://iucecb.com/files/file/25080062646.pdfIn PDF document text
    • http://tehnicgaz.eu/files/file/87540836648.pdfIn PDF document text
    • http://gmtshipping.com/attachment/file/xewuvo.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/84751810433.pdfIn PDF document text
    • http://captaincook.hu/userfiles/file/pimutewevusone.pdfIn PDF document text
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/77541563282.pdfIn PDF document text
    • http://spiregene.com/image/files/20210910_023045.pdfIn PDF document text
    • https://semangkabiji.com/contents/files/xokisefefeleje.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/tepefekagugejas.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/22662344692.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210912_230747.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/sonaxovafokumodivib.pdfIn PDF document text
    • https://berbagiangka.com/contents/files/bosaniliru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=screen+translator+mod+apkPDF link annotation
    • 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_off0000b6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF02 14008 bytes
SHA-256: ace6c33a6aa9a63e54a631715098bf7d62abb0ce57c3a57d07ed01b64581314f
font_02_sfnt_off0000f1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B3 10752 bytes
SHA-256: f7223aac8b15504daa15330d430804cb83d5c906e7d555a30b1928c9e9f6a409

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