Malicious PDF — malware analysis report

Static analysis result for SHA-256 146ad015f0d9d84c…

MALICIOUS

PDF

257.4 KB Created: 2021-07-03 17:09:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 4efc20e2ba98d636c22d2ccde28b756d SHA-1: 5f4c06783c99ba330bb762a95ea62d26eba6967d SHA-256: 146ad015f0d9d84cff8f10fdd74fc846fa5775854da46ac8ec0f03a1da264c65
226 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the document uses a browser extension/update installation lure, a common social-engineering tactic to prompt users to download and execute further payloads. Several URLs were extracted, some pointing to compromised WordPress sites, suggesting a distribution mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://ipublicity.cz/data/file/tajizanitarewegifegi.pdf In PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16098369e1a320---jatodutavam.pdfPDF link annotation
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/62204723793.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087449231917---98755604795.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a738fd0b1b3---jegiwamisaso.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2dd2e6603a---17801538208.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f2dfdc1f2---zapegosumifudarakabujebuz.pdfIn PDF document text
    • http://formel1vermietung.de/userfiles/file/jepipizomuwezarog.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74af8a6498---23633604649.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a3523fc1775---23468477460.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/82146191767.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/98997364611.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/vewigamurivi.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/vinawujofataja.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb052e1bcf9---11008571415.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/basokipolopa.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/60f6109a24a97187bd63836e4a8aca76/8483912743.pdfIn PDF document text
    • http://biosite.ru/images/news/file/99229722960.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/je7rl4nc4ebvekcdbu5idojpp7/tabevokuwesozubimobi.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/42993f4c8e443e2ac467e8b3763ffffc/sifolavexabusud.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/65863790365.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/51f828018289ef9873a8ae69f258a2fa/48635799513.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160d199c368ddc---raminaxiva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=s7+1200+system+manualPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00037cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37CC6 18412 bytes
SHA-256: 234a24cecc5952663f07cceef4404ae513df720d1760e41efd701103736b5fdc
font_01_sfnt_off0003adad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3ADAD 10592 bytes
SHA-256: 279ad941080962b037d05ae010efabd3e6cbbae077ea925b1944ec5c75da51e9
font_02_sfnt_off0003c611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C611 17648 bytes
SHA-256: 81978b00f3ffd01f60f88cbc5036075daf50e0aef0e0df7b795e62ee4cc4c46b
font_03_sfnt_off0003de77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DE77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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