Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d2c3a1622d00c14…

MALICIOUS

PDF

70.4 KB Created: 2021-09-27 07:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ed5c173ea5393766eaca50e6dabd976f SHA-1: 2af71589cc91d9dfa4fca6393880308691cd5f89 SHA-256: 8d2c3a1622d00c1423cd943a68c2199748a55ba9eabc01b545cdafe0606cae4f
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The document body is unreadable binary data, suggesting it's not intended for direct user consumption but rather as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pixomot.ru/uplcv?utm_term=splithit+pro+mod+apk+download PDF link annotation
    • http://pincesorvarshop.hu/editor_up/wilufes.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/nerire.pdfIn PDF document text
    • http://medrea.ru/upload/files/puligoxet.pdfIn PDF document text
    • http://sun-green.eu/ckfinder/userfiles/files/tajew.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/ccv8mgpfb1pns2cqnfqhfv9jct/19907494666.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/59886253680.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/92058218171.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382c5658fb1---49133774859.pdfIn PDF document text
    • http://congtrinhnhaviet.vn/upload/files/vutes.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614439cc6c917---puwesiti.pdfPDF link annotation
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/161396f97705f2---jojifopagel.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/sagekebumafuriraxi.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/fufosadumemibowokupijoja.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/maromotubefebidusar.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/jisijoluruvexebu.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/zunave.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/23943941357.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/palameguxif.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/53907199641.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-1/20210901135619755664.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/89088412985.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_off0000aed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAED1 10612 bytes
SHA-256: fa8bc66d114f0c68cc7efdf07070cedc1a5024504891d248180767dfc48fbeb0
font_01_sfnt_off0000c6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E3 17548 bytes
SHA-256: 629f49c795928f151e898cf46d57a8b81f5dbf5d6e3b0991730ffeb6ad6499e9
font_02_sfnt_off0000f439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF439 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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