Malicious PDF — malware analysis report

Static analysis result for SHA-256 c407779c268987fb…

MALICIOUS

PDF

77.7 KB Created: 2021-09-15 20:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d5cfc7f17c2f3bd713152068d8bf3871 SHA-1: 229f68ddfb0b00d59833320bc8c722d864ab6ce4 SHA-256: c407779c268987fb07334ee794552d8f6e7b0ec4581270c6ff0a5d2ee107a232
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external links, many pointing to PDF files hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution attempt. The presence of a visual download button further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=free+damon+ps2+pro+apk PDF link annotation
    • https://dragonexpressml.com/userfiles/files/77669823126.pdfIn PDF document text
    • http://cartopack.be/Images/file/birafifemusiso.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f94f586fb2---popogekafiwerewezuna.pdfIn PDF document text
    • http://konakelektrik.com/userfiles/file/82963612531.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/633lq7vkjskff1ltuu65usm6dk/joruvomokigazowof.pdfIn PDF document text
    • http://imdad-egypt.com/userfiles/file/sutizotinewotukejavof.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/f0316e4c4b9656f5dc2a16a310aab264/bekaxopulowamujigik.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/xarujogowigetuzage.pdfIn PDF document text
    • http://xn--q20b13r9leepaeb.net/upload/file/202109101301228987.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/6844601136.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/68200863945.pdfIn PDF document text
    • http://nobody-films.com/bpms/includes/fckeditor_uploads/userfiles/file/jonolev.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210904191052.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/71be12f1904bcfd994c2feffc7be3024/49789259967.pdfIn PDF document text
    • https://ekinyalitim.com/depo/sayfaresim/file/62773813943.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/buwoxofosixapiza.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/2656080891.pdfIn PDF document text
    • http://jiab.net/userData/board/file/80082238024.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/1bc540f868a502fb28a10274daa34bf0/18715329706.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/qpjvf44p6lip07276sbqnjoa19/4536750669.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/ba15f0ad39fe05a991d8214edf891192/4261192520.pdfIn PDF document text
    • https://ostrichtours.com/ckfinder/userfiles/files/nigefijozubamewem.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/ferilalubexedolef.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_off0000ca52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE269 10508 bytes
SHA-256: 5d8636a6f50863ea44634862acca6bb955b4f8c0370ba4fd1a30e151c42b4d40
font_02_sfnt_off0000fa4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4D 18676 bytes
SHA-256: 4f39a04d2b0a0e44f622435276dcefc015ca3a4c3732dc9bc3357be14eef3670