Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6393ab22c7b650…

MALICIOUS

PDF

72.6 KB Created: 2021-09-04 07:33:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 336caf6af16503b5589cf9107a6eb27d SHA-1: 9afda9e5fe5d7d071d607c79ac3d3e92fee81711 SHA-256: de6393ab22c7b650751d46f8785978557ba148445cb2b5c866563de44cb726c8
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, several of which are flagged as being hosted on compromised CMS uploads or part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or directing users to malicious content. No scripts were extracted, but the structure suggests a lure to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/71581428366.pdf In PDF document text
    • http://igigeothermal.jp/userfiles/file/84639378072.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/lupava.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/detuvowurukisewaroteb.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/fofazejopumetonakoxamaned.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f08390c28---juzofaxuwedibekewadezulo.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/pasuzenozotoxonixe.pdfIn PDF document text
    • http://csaladiegyteruautok.hu/userfiles/files/pemizuxapeditopid.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/34274473026.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dccc92f4226---12406992123.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/59613432936.pdfIn PDF document text
    • https://melz-feu.ru/upload/41249393941.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160863c7d73838---30390666083.pdfIn PDF document text
    • https://samsungklima.net/upload/ckfinder/files/wowologelubaxugimadifutir.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/bcd7804f1583d3b9c693c430dadcf457/89020603710.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609843ae8afdd---metevo.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/14864193762.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/t5aio070e8da1fc6jlspld56f1/43541706079.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/32944771278.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/20605021162.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/c4b7ec957820a07337bf873491bf678a/67322548695.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/10061948641.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=ganesh+mantra+in+bengali+pdfPDF 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_off0000b534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB534 18088 bytes
SHA-256: 101e40e4769a20dbd0ba26327d326a05790ad20be0340d98788a9e5bd5224952
font_01_sfnt_off0000e3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F3 11004 bytes
SHA-256: 92765ccc04733cd6ad2d9f53b935c35b6b8b5faaefa8fe08c225f243f3c7323e
font_02_sfnt_off0000fcda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.