Malicious PDF — malware analysis report

Static analysis result for SHA-256 1116027b07e728c1…

MALICIOUS

PDF

78.8 KB Created: 2021-09-15 23:28:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6252ce82e1c7e5610f0c907d9d9172e3 SHA-1: 97ca1d10375883e1742587d74d6fa46ada41b291 SHA-256: 1116027b07e728c1efd0bc8d0b9e3a50e3b53236c42d916befd3230f63559b6b
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded JavaScript (T1059.007) further supports the malicious nature of the document, potentially used to download additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=televizo+iptv+apk PDF link annotation
    • https://go2germany.ru/files/file/bululefafasowelaratexap.pdfIn PDF document text
    • https://koparieshorvathbusz.hu/files/file/pewexititetad.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/1037249321.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/fudurorexosawuwep.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/puxojoxopinevajuxa.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/lusisetuf.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1a9d815fe---tewajujul.pdfIn PDF document text
    • http://paulgraphics.paulsfashion.in/files/34456513935.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16133582991bb2---bebij.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/nivutajasus.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/83139927880.pdfIn PDF document text
    • http://midesignvn.com/uploads/files/6447255065.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/vobesum.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613690b925daa---xidujeminadepoletamav.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/25817052607.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16134255639ad2---jesolevawisek.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/26547360138.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/vuwirete.pdfIn PDF document text
    • http://cetis156.neutronds.com/assets/js/ckfinder/userfiles/files/wajevujasawozat.pdfIn PDF document text
    • http://jafra-com.at/userfiles/file/32520943947.pdfIn PDF document text
    • http://ambcavallon.eu/userfiles/files/zamefikan.pdfIn PDF document text
    • http://xhiehchin.com/Xhieh_News/_file/lizisefut.pdfIn PDF document text
    • http://autoservizimensi.it/images/fck/file/sijemananukefofoxupo.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613354a78bd96---xuxuz.pdfIn PDF document text
    • http://screen.by/images/file/xejor.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_off0000d243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD243 17368 bytes
SHA-256: 46348faf5b0bbb166f85068c7078f5fe885c4e4ec9b06009bef0a1777c15f281
font_01_sfnt_off0000ff72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11789 10052 bytes
SHA-256: ca9e11016f30fea5501e28124251495e88dab7be8fa1a4fb6c1a584c6aa14206

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