Malicious PDF — malware analysis report

Static analysis result for SHA-256 43150c0ba9948417…

MALICIOUS

PDF

71.6 KB Created: 2021-06-29 04:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 159de1e9b0e24abe911eed1084dc4b1d SHA-1: 17acb944c7f411fccd8e512d1fe0156128e8294f SHA-256: 43150c0ba994841749ad78c7f2f7f4c553ebe9fa1413ad63a9eaae838ed788eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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 http://millecolori.it/images/file/zikatoritoxemerujuxatudip.pdf In PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/4d76245fe795ab10dedb687be4a9beb9/wikataputakumur.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/d0a30d42647551c323fbf9796ba0b4ab/muziga.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/1qsn4rch5t8cdsm1sbu4sush0q/40784327893.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/23096193393.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/linowakiv.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/m7qac1q5bbia6qgvcnh0s4c493/fedogetebaraf.pdfIn PDF document text
    • http://taskentcompany.com/userfiles/file/26402636005.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16089d83a3c396---31775150282.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/t060tgpngtc4eqdripga5s69te/27229647880.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/0d937867831a0a3ed45f3d971bb78e38/belevezopotiveva.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/43cac1e08752f98c653ca56525e64133/30349641186.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160d5af3f62ea2---zilaxunirosigu.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/5efl65kkpnmbqf2pmh9s8l1d35/58178209909.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e9a2dc161---pusaxa.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160ae43dbe725a---daxepotagolitetaribokuto.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/1a9a5ed8858bac2c000f9a42d778706f/selodepepiwawuwanogiv.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16077dc1f7bda5---97412459026.pdfIn PDF document text
    • http://catherine-massage.com/ckfinder/userfiles/files/20169230228.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d489839250---wimofefekidaxixuxixij.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/rilaparoxiwaxulugutin.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/kigewisu.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09d5fa01e6---ropojatudaridarewujupu.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160736e9ed68b9---fifumumusaseremalanof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=once+i+was+seven+years+olderPDF link annotation
    • 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_off0000bba8.bin
9fe501b0385d58f8c9293baab257e57178e390fa4f301e7ed38f78685ef6f8fa
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA8 10556 bytes
font_01_sfnt_off0000d3f7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F7 16792 bytes
font_02_sfnt_off0000ec09.bin
a0b55229746237fa22edd91a866ad9af575024b8fc773c2a0cdfd4950b16bb2c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC09 14700 bytes