Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e7fd8bbe011590…

MALICIOUS

PDF

86.9 KB Created: 2021-09-01 20:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e2112f30520d18367ffec19452b1aca7 SHA-1: d929a14c34be812e75fd900df6eb57fd8445b17a SHA-256: 08e7fd8bbe011590021e2fe07cae211b1a4aae6cefc02230e0fbab2b6d61c044
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous embedded URLs that point to compromised websites, likely to lure users into downloading further malicious content or submitting sensitive information. No scripts were extracted, but the presence of multiple compromised CMS upload links and disposable hosting suggests a coordinated effort to distribute malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://queure.ru/uplcv?utm_term=birthday+wishes+for+baby+boy+5+year PDF link annotation
    • https://aldurra.ly/images-editeur/img/file/faxafopimol.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160825e8431d21---60387615620.pdfIn PDF document text
    • http://lawfirm.vn/MINH/user_files/file/kekosozedazularujepanuv.pdfIn PDF document text
    • http://asesoriazabalburu.org/azaba/files/file/92839318509.pdfIn PDF document text
    • https://tkquiz.com/userfiles/file/87082765693.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/e499d420e28889c95fddf488eb5cb756/46093172462.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ek7jvsn84vm1irgjt8jqfd6nta/17893073888.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/0814e812ef239d6ea7638bb5f01d51e8/52184548452.pdfIn PDF document text
    • https://pinkrali.com/calisma2/files/uploads/mekologigumakupar.pdfIn PDF document text
    • http://familycrawford.com/clients/3/31/31f1fdc6e90c562b7578e9c437f7c1bf/File/fagageteragumefudan.pdfIn PDF document text
    • https://diphong.com/uploads/kuxeranaxebewijepiruv.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/ea89a7d5558f98e33f9ae125c899bd63/90337007641.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/ufbuomq16jejpqmfnk37d0j676/24758420917.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210807_95C8DE8F0F337E4E.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/n4uer6j8ntbd715mt3tvo7059o/35558667028.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/tufijasen.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a730fcda88f---giwuvekejibora.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1611b7e70c907e---wujegobom.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/wojeteziboz.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/57364371567.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/jujubibaxejuzine.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/tukanafoxapikad.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084b70d588e8---zopuxokoxuxurakezedo.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/21e43f5777213c6b28fad0c45757aa1a/86985241968.pdfIn PDF document text
    • https://cecprint.com/images/file/tadidamib.pdfIn PDF document text
    • 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_off0000edbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBC 10828 bytes
SHA-256: 6cfcd5eb7a0b3174364cdfdb4ccf2f6070554c3d728028cb9ec4823eb6fe2371
font_01_sfnt_off000106f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F8 17664 bytes
SHA-256: 7bb855b065eec0319c3d20542b1492f238aa4f2054f352ac02e90d5f227ebe65
font_02_sfnt_off000134c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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