Malicious PDF — malware analysis report

Static analysis result for SHA-256 1511f17b8f95fb4f…

MALICIOUS

PDF

85.5 KB Created: 2021-07-07 02:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7aec2c874aec60d1739718a8e24026b1 SHA-1: 24b7298ca7169d5621d874c0295e28ea50446ba8 SHA-256: 1511f17b8f95fb4fdf7b2b37541f22d27ff9df284bf8df597aea1878440e008e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed for SEO poisoning or phishing. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ebal.ro/app/webroot/files/userfiles/files/nimofepetibefi.pdf In PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/e3397f1f739803c334e97a003b23a945/2215226278.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/50778332227.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/a1bbe58fed60eb0d3496d437435c7e6b/16486811585.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/e4a7578786bfc5a1fdd00265c6b5851e/darozodawegigivoxov.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/sudimepudaribixij.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/7p8bsra1h5uhn1tkenvlirdalr/nasipuzifegezemovaziluzot.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/ffe0c7a0d3d75bb41246fdb38ba2fc71/51195892702.pdfIn PDF document text
    • http://djapm.com/userfiles/file/28268351579.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/57360732112.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/sokizagilo.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1312308114---wipofowal.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/69057323920.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/tkcg74jfevcvrpl16d48og7qh6/zubunabiv.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/37739630734.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/de07ed01cf4b03fd31a6fcf14dde5e21/legis.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/92416908883.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/8ba42852683569465defd82011c6ea4d/kaxodukuli.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/lifupunumelejunag.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/rorexejokorelasom.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-18/20210518131651402420.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/8b442jhtnc3ricr9rjvecae4rn/84006111573.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/30a65905b361ec95d62ef98ac4dfe401/53039281813.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608aff8fbfa8a---gukaki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=a+haunted+house+tamil+dubbed+movie+downloadPDF 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_off0000ea95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA95 10788 bytes
SHA-256: 0d47c317d414c60c7b476048d05c2935b4c1af95b8db924c2c871d696b72355f
font_01_sfnt_off00010342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10342 17340 bytes
SHA-256: acd5f9d42c9bc1f2dd288e7e7dc80179abf8a41c1406b49aadbc077cb8d77a34
font_02_sfnt_off00013098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13098 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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