Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3fd7f0d15eb933a…

MALICIOUS

PDF

86.0 KB Created: 2021-07-17 05:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f7337f0acf0dcfe0600c109b5668765e SHA-1: cfd0a69936d2963982a4f939dd603ef45d9483e9 SHA-256: f3fd7f0d15eb933a76162590ee471588bd462400bffde1ef46e82638943638f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to obscure the ultimate destination. ClamAV and ML classifiers strongly indicate malicious content, likely phishing or malware distribution. Although no scripts were extracted, the PDF structure and URL patterns are indicative of a malicious document, potentially delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://plasy.com/uploads/file/78812179764.pdf In PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/b1bdbcf0bcdee6c44fe52070eebb531a/28583787404.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/ruwobamufu.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f210dd3d61f---xezagegafejog.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/11660155646.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/56ba60bc6c32abbac96d5f003a2dbef8/xesegadexubowuz.pdfIn PDF document text
    • https://turismoporsantander.com/aym_image/files/40008551429.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/kolosutitebugenejuki.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/f8o9ob476t553n75ijab3vfdu5/14256089357.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/91198653733.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/56749273627.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/d05b8ae57e78d27fdf39c9d3302bf708/63574053727.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/acb4e017388363a24cfd526b4fb9e031/xudetufifi.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1df59e371---xulobenol.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/89704927264.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c048acc7e4b---bezaxinosinupedati.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/3e539a820038e4f3321743ac0dee0707/gisomofupifujakareta.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/95407720206.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/u61bm2jv1f4vci8va9ibc1t1l5/nelavolegififasip.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/bevatozapekokiralenagegig.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/tavakunuwujawuloguguvew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=what+are+the+seven+philosophies+of+educationPDF 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_off0000ed32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED32 16564 bytes
SHA-256: cce85a45dfd82e06b81a1f9d6dc36fcb27f91016b933cb7776197d3273aa580f
font_01_sfnt_off000117a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBB 10876 bytes
SHA-256: 4b903a8292fd13e5dffe9401151fef2743d7a686a84f1362dcf2e5ef4a9409d8

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