Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd372581cb2e559…

MALICIOUS

PDF

68.5 KB Created: 2021-09-10 03:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 31d1d2dc012aedb4be1f43a995fd3d7a SHA-1: b5831dfb07bb31cd69308e0e23496b6f555e0952 SHA-256: 9bd372581cb2e5598492812ae79a2cb6640967029cfc5ba6e7254679e1294c2e
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, including one that appears to be a lure for 'lightroom apk mod pro'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common method for exploiting PDF vulnerabilities to execute malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=lightroom+apk+mod+pro PDF link annotation
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/rudokevefez.pdfIn PDF document text
    • http://www.pro9apps.com/app/webroot/files/uploadimagesfile/17475101303.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/79540647794.pdfIn PDF document text
    • https://helices-evra.com/userfiles/file/60663403446.pdfIn PDF document text
    • https://prcomponents.com/ckfinder/userfiles/files/ziwivutolimijesowipabulo.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/63354272947.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/68707816950.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee08c637a0---41185020778.pdfIn PDF document text
    • http://tieulongcopro.com/luutru/files/60822245829.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/46781206326.pdfIn PDF document text
    • http://hueide.com/upload/files/88780550957.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/xadisozikijujoxidufezolep.pdfIn PDF document text
    • https://bonekarusa.com/contents/files/dixokub.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f08b09d542---rumetisitadekebitojo.pdfIn PDF document text
    • http://teewer.mn/ckfinder/userfiles/files/xojoliwureposuvotegig.pdfIn PDF document text
    • http://dyneco.kr/userData/board/file/tosilopodebu.pdfIn PDF document text
    • http://briquettemachinery.com/d/files/guvexegofisugali.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///wepebabepowuvejeweva.pdfIn PDF document text
    • https://kingdom.vn/userfiles/file/72243548735.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/87816104320.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/19144703896.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/maroxesigilulekar.pdfIn PDF document text
    • https://saigonservices.vn/images/uploads/files/zemedagenavibivupe.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/25497222237.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/vowupizebaweganadesiv.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_off0000afc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC6 15204 bytes
SHA-256: 5f1749eed6918b4764d14137341191a2591b2799c5d5788d2540ac66d05ebda9
font_01_sfnt_off0000d522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD522 10440 bytes
SHA-256: 8a8f0f30ca1b07124f033f4241ceeb2e948d1fce09b2bec89f22edb12d5a01b8
font_02_sfnt_off0000ec94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1