Malicious PDF — malware analysis report

Static analysis result for SHA-256 749bd52f365c0031…

MALICIOUS

PDF

81.9 KB Created: 2021-09-20 22:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e7f963d03b8d767617eb5b3a77fbfca1 SHA-1: 86639e79b0b361ee1fa9e007869ab6f828ce6c43 SHA-256: 749bd52f365c003130bd450492f04542e18e2b6fee5066e66d34509a4e4a2677
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to numerous PDF files hosted on various domains, some of which appear to be compromised or disposable. The purpose seems to be SEO manipulation or distributing further malicious content, rather than direct user interaction within this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://traffictkt.com/viking1/uploads/files/19112638288.pdf In PDF document text
    • https://ms1oke.com/contents/files/pitovupiruridizamozeba.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/14810177483.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/70413238826.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/b5b3526b560ca28163e86130fddcd085/mowepizoxogokejanozat.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/49796715496.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/gunitadugoji.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/999f7731bb59382fd743d9800d2c2765/64748145716.pdfIn PDF document text
    • http://kodemari.info/data/files/tixamozatogikijinux.pdfIn PDF document text
    • https://aedwea.com/upload/foto/33178562156.pdfIn PDF document text
    • https://liftsystems.ro/LiftFiles/file/punekuzepejididej.pdfIn PDF document text
    • http://kmjmt.com/news/upload/file/2109200059417717413zidhk.pdfIn PDF document text
    • https://vadihosting.com/calisma2/files/uploads/38591831074.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/vadanerulu.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///85546760941.pdfIn PDF document text
    • http://moristas.com/userfiles/files/81733386209.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/6b9rds06hkoka943avdd8tfgbi/bumikep.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/72843046001.pdfIn PDF document text
    • http://materialdeestudo.top/userfiles/files/54413258418.pdfIn PDF document text
    • https://epgeptech.hu/ckfinder/userfiles/files/86916644760.pdfIn PDF document text
    • http://gnox.vn/upload/files/vojuwifenilepilaxan.pdfIn PDF document text
    • https://areicon.com/images/file/nonas.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143321bda521---32796882154.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=naruto+senki+all+versionPDF 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_off0000ddc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D4 17192 bytes
SHA-256: 45da42249167ed8cc92ae9bdf8100e1f35336919da709d04f3091b60ff02a057
font_02_sfnt_off000122fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FD 10336 bytes
SHA-256: 90ebab6a569f2f97590ba2471ba9a07b417a56537aa1e77cd62a2d7a96377a3f