Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af10e2eba446131…

MALICIOUS

PDF

98.8 KB Created: 2021-09-16 01:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f2a9077ecbf3b701b5f38dab74be5f56 SHA-1: 69ef976f6078689785f92c00fedf7be6fcc0639f SHA-256: 3af10e2eba44613109e640905c24e0bd83c1b0421a20eb8df0c1be407cbdfec1
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains embedded JavaScript and numerous external links, many of which point to compromised or disposable hosting. Heuristics indicate it is an advance-fee scam lure, likely attempting to trick the user into believing they have won a prize or are due a large sum of money, which requires them to pay a fee for delivery. The embedded JavaScript may be used to further the scam or download additional malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 http://ampletrekking.com/userfiles/file/jizawitatijujinetosavo.pdf In PDF document text
    • https://satbietthu.com/luutru/files/xofajenekozilisapebo.pdfIn PDF document text
    • http://fabriquetextil.com/js/new/fckeditor/userfiles/file/96771579543.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134be2b77157---93265628929.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/2g38ife2blc9k31dhh2remmgp0/36024284498.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/45006395795.pdfIn PDF document text
    • http://edallyshop.com/upload/files/guwalolusula.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/safumezedivasimalajubus.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/47781790664.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/fiduzeranamirabobonofidid.pdfIn PDF document text
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/dirudutix.pdfIn PDF document text
    • https://zmiz.hr/userfiles/file/77036743927.pdfIn PDF document text
    • http://www.siphonicflowmandiri.com/upload/files/62630578625.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210902010848.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/sukotugemarib.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/2464129716.pdfIn PDF document text
    • https://intekcanada.com/ckfinder/userfiles/files/53267493463.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/vabozasijug.pdfIn PDF document text
    • https://mi-stores.com/basketballtotaal/images/editor/file/42741043040.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/23139130052.pdfIn PDF document text
    • http://vietkinggroup.com/uploads/userfiles/file/bunuruki.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/25533989752.pdfIn PDF document text
    • https://tch.lu/files/files/42813063268.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/57bfb68b55f13b416ccbdd3fb243c17e/96564692417.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/vutexeduwusewefevep.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/rigigibitulexidutalel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=rainbow+game+apk+earn+moneyPDF 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_off00011d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D62 10760 bytes
SHA-256: d9a04e970162f5094ef841935bb0348a7c4249b8df0e3fda4ff6d3dc7d98d364
font_01_sfnt_off000135f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135F2 18256 bytes
SHA-256: 9c12bbf32ad6b562b46a00cff6814937af75ea91602f9e1e77f81ec62428eeba
font_02_sfnt_off00016587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16587 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1