Malicious PDF — malware analysis report

Static analysis result for SHA-256 eafbab961a299f4c…

MALICIOUS

PDF

113.2 KB Created: 2021-08-17 03:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: 66893b0ca385ea50d9f2e36e3557fdb2 SHA-1: 5099a81a57b9a323c037e70fb3d613bb5932ef57 SHA-256: eafbab961a299f4c95385fd42efc5f59a85741c39aedc94d1b668a67f6520532
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://ketchas.ru/uplcv?utm_term=fast+and+furious+7+full+movie+in+hindi+720p+filmywap PDF link annotation
    • https://27061010.com/uploads//files/202108120730375338.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4536bba85---5388383142.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8bff740a39f39b4758ed9bb8becb5b04/75962483880.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/3918390a6fdf4218cd522d0ebab2c7f9/24971892915.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/mutejup.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca0e0a6d538---wufir.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/1d7525c343b2e35d294de63bdb233398/13229845775.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815c3397c02---3909976658.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/emgcgf94i2t4daqub8kmu6o7rq/12001834164.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/pegoduwudon.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/50729752273.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/tosovu.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/f08ce7b7078617809a0ab9d0aff40d04/doxuripokiruzakibib.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ea40ef9a1---xigejanazifixufoliber.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/6563055674.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/5778568f85dfc03d35f0850bef9a23c4/7679197774.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/xovenakabutelepokejadeba.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a1803bb8a---lamewisefaredarutoxel.pdfIn PDF document text
    • http://ruoumoc.com/upload/files/94056170775.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/berazalutapeten.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/28aec8fbad0c7cccdb8891abf03cbc3e/41217222630.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_off00014fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FBB 11400 bytes
SHA-256: 4bd636747dd81215f0097440fc4c302258cc985de25e8a11d69c680a75d522db
font_01_sfnt_off00016a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A89 20840 bytes
SHA-256: 47e38e708ae3b008be9defa4792a4261d83f653ef30e38e570b025e5e0c1e359
font_02_sfnt_off00019eb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1