Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f57e19adedaa5f4…

MALICIOUS

PDF

98.0 KB Created: 2021-06-10 09:24:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d4c5c4ca4ae404d494ac2d2c1e8f18b1 SHA-1: b617bb96bd4c0d474216d1827f0dc95b6127cc15 SHA-256: 8f57e19adedaa5f495347d2b56875eab97dcd87105aaa97d7c199c78f5613dbe
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://garglob.ru/uplcv?utm_term=roblox+synapse+x+free+serial+key PDF link annotation
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/liuf4u12plqfqb2lj1qr1c9ule/loxubavexovomowiguxaba.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/56824224221.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/94888412c082a394906ed75203bb783f/9011679701.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/cfa828cfffc775b39eb38ffb25da3b4a/62279465730.pdfIn PDF document text
    • http://kasargod.net/uploads/file/75023451022.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/vipixotitegewovoboboju.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/gomoruxuponizovoxanopune.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d13bf10751---zojij.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/56792706049.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/vadogumepopijozo.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778d2def0a4---40255446717.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/dozapapifitoxerisosi.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/edc3folvp8mv10s9ahcbss6p75/rakedukeledutor.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/75286574736.pdfIn PDF document text
    • http://maihome.hu/admin1/file/42936364438.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/dorutamekula.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE919 6848 bytes
SHA-256: 7fdb6bae25edbf8a5863fb2d80f19fa9382bb140814c9374088b9cba298b6240
font_01_sfnt_off0000fa79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA79 5276 bytes
SHA-256: a308ff2574e4a55744ed3cf4957f7a94eb55eaaa7e23b3b48963b6679331ed57
font_02_sfnt_off00010c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C86 7572 bytes
SHA-256: 497f8d3f149b72be45d8e6cf6d90f92fd1ee6e6457e89ea7d76cd2bc55ffdaf1
font_03_sfnt_off00012211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12211 7568 bytes
SHA-256: a36d2bea0698e0a6d724584aea311aca50eb05fdff13c8c6baaaac8f0641d24f
font_04_sfnt_off000136e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E5 12592 bytes
SHA-256: a92bc77330b6e1c20cc914d5f0372a54be86188a839424abeeee947ddc893712
font_05_sfnt_off0001617a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1617A 16372 bytes
SHA-256: 1cb71d31142351cd66cb95e69fd9df7f750598e9f8edf9dc75a0c22f5be88211

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