Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee27b8e0480927d7…

MALICIOUS

PDF

76.8 KB Created: 2021-06-06 04:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e516f40e0b9d2b8e30a20ffd4a32cb9b SHA-1: f33433b007786d88baacc592231453e6e7e668fe SHA-256: ee27b8e0480927d794dc30dd09fde8c5b1339b15c290983c4e9bb193e823911e
176 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The presence of a 'whatsapp plus latest version' lure suggests a phishing attempt to trick users into downloading unwanted software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://wastran.ru/uplcv?utm_term=whatsapp+plus+latest+version+2019+apk+free+download PDF link annotation
    • https://arte-salon.ru/upload_picture/29797933948.pdfIn PDF document text
    • http://charivne.info/images/file/10224895221.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/a9d5d114eb06d707ff6bad9efa262010/24031322095.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/3f1fd7da113befdfc4084f0a9a1c8391/27740956700.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/5c9aff7dbb9bf30fea9132205d5cf02d/84075498299.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160baef1ba3521---7121580968.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c2958d0ae---gizeradupe.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/7dli6gic46ijd1a5aq7ovjqlgp/novaxugapavoxefanuju.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file/%5C/91076205075.pdfIn PDF document text
    • http://beateromer.com/bilder/file/mazub.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/3a85a47c2430ebd1b9a50ab15644409d/99415994908.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160962c03757ff---25124787319.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/hv86jd16mfevgm31kte92guhhv/60329428322.pdfIn PDF document text
    • https://genegurumiraclehealer.comuserfiles/file/kavokije.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/5998095126.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b0656f2c5b0---kezoxemizatikevo.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
    • 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_off0000dfdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDD 5724 bytes
SHA-256: ca6289dab7517adb3464572b4e159e5276610f8456cd9ce41554f2666b829a99
font_01_sfnt_off0000f371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF371 10588 bytes
SHA-256: 3a0f01a558daccf34d98a0a743c2c40b3fafa302acecbaed6a136163554833c0
font_02_sfnt_off00011764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11764 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176