Malicious PDF — malware analysis report

Static analysis result for SHA-256 34257a045fdba089…

MALICIOUS

PDF

80.2 KB Created: 2021-09-12 03:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f6bc1c1d264447edd03fbd449fc820a8 SHA-1: 100f80402ed11daa9a9cdae2be25ce8b17721589 SHA-256: 34257a045fdba08972d0ec0289fa74c47fd5f5d55e163636f2a84724553d22f8
216 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristic 'SE_BROWSER_INSTALL_LURE' strongly suggests the document's purpose is to trick the user into installing a fake browser extension or update. Multiple embedded URLs point to compromised websites and IP addresses, likely serving as download locations for malicious payloads or further stages of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/58baa7590f9c8538e58e6b1d86060135/14599983236.pdf In PDF document text
    • https://lotteppta.net/beta/assets/file/83040390170.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16133f2b99c23b---dojilejimigogik.pdfPDF link annotation
    • https://www.xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/3887585960.pdfIn PDF document text
    • https://phucatgarment.com.vn/ckfinder/userfiles/files/zelozafadiwugesenevutod.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/ramefowezar.pdfIn PDF document text
    • https://almentispharma.com/ckfinder/userfiles/files/61656467208.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc13ae7b9a---zagugafategalenibegavas.pdfIn PDF document text
    • http://ymjgolf.com/file_media/file_image/file/tevuditidiraliwopuxedov.pdfIn PDF document text
    • http://hawaiianhunareiki.it/file/47123740192.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1613966b76c49a---21044764263.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/beseliriroxejan.pdfIn PDF document text
    • http://nzozkrowodrza.pl/uploads/editor/file/wakarajimukobinan.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/86099550823.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/zomobokaxekipu.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/lewupaduxelunegakuviw.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/75384870706.pdfIn PDF document text
    • http://bentleyplemtech.ru/userfiles/file/xububidolupoxilijovu.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/pobukozarujerov.pdfIn PDF document text
    • http://bocghebinhduong.com/media/ftp/file/26334692597.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/zegum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=dark+theme+for+chrome+windows+7PDF 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_off0000d41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41E 17876 bytes
SHA-256: 40de4effe61a5381675d85c6d7c9fe72ab30d56d0955e720f875c24b9ccc2ef7
font_01_sfnt_off000101e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FB 10924 bytes
SHA-256: 36f5479885475c13421c5a078e0fcb8bdcf3542c79626a695c6ea93db72edd72

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