Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96e154fdd965035…

MALICIOUS

PDF

77.5 KB Created: 2021-08-19 09:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 261f3eb4897185a1b140f7d8199d078c SHA-1: a4615d49c1a7c24e9e811a0e475cddc4547834f8 SHA-256: e96e154fdd96503564a8a4b990957c4894724ead37681c5dbe4f680bfe015407
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution, disguised as a guide to recover deleted WhatsApp data. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607330600580b---nasemixesisewijape.pdf In PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160832affd4d10---rugojalogewuwaw.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/76278523720.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/renegiraxojetufipujuleziz.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cadf2ed30b---fifagejutojiribes.pdfIn PDF document text
    • http://esistore.be/userfiles/file/73938087415.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2fdd859b8---84664005086.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/jewetifaritox.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/nanivida.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a716db21ff4---gorobokojixuxukiro.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/reliwarogogujub.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/tuvazomawajovid.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a7447a546---11595944444.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/lamurofuwumomobukiwuse.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cf83104ae3e---vipejuxefatibitasojeruni.pdfIn PDF document text
    • http://karpatskiles.ru/store/file/34536131790.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/vgmh2ul006lh8bhibc9a77nuoh/15578285008.pdfIn PDF document text
    • http://lawngo.net/fckfiles/sikibalusibexavize.pdfIn PDF document text
    • https://rumputhijau.com/contents//files/wosarogadas.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/58748103833.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/29893491671.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c057fa9493a---18042042052.pdfIn PDF document text
    • https://strechybenesov.cz/content/90301533499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+can+i+retrieve+deleted+whatsapp+chat+history+androidPDF 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_off0000c94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC94D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE164 10868 bytes
SHA-256: 95f516fc225f8c76847716c9b053355300bc9fcae4073f53b5a483c1db1c0deb
font_02_sfnt_off0000fa77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA77 17184 bytes
SHA-256: cb7cbe18fff9b2a50b5fb908d355d4c7861e32e55ff868fb630753342fc39a74

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