Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cb25a57534c785…

MALICIOUS

PDF

78.2 KB Created: 2021-08-30 22:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: f29817c94e37939ea4ada4f017eff453 SHA-1: d92980dabe9491eaf9ffbd30f36342ba13ca9ae1 SHA-256: 14cb25a57534c78595426d0513718624375a20b3889d3cb72cf6ef9e5ae81314
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The presence of 'utm_term=gta+vice+city+cheats+for+android+download' suggests a lure to trick users into downloading potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://folientastaturen.pl/_data/file/92201950684.pdf In PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/uq5mc2legmdemp4khenkmts9ac/gejetidoweduvenuvo.pdfIn PDF document text
    • http://novo-foto.ru/ckfinder/userfiles/files/dubelizebunetepik.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2f3c98562---46203391454.pdfIn PDF document text
    • https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/tadejutujime.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b978e099f42---fesurogedawed.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/57242161444.pdfIn PDF document text
    • http://littlefreddieking.com/clients/65037/File/13361400118.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/sazuwatubovofelujumuxajud.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/gizupatuxipufegosajizazu.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/topilajuziwaliwowapew.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/2486772234.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/bdb359a1fc9deca146257a4b1fe3edfb/20949402848.pdfIn PDF document text
    • https://whatshoulditcostme.com/userfiles/file/83967758394.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/51331501771.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/fisuxopara.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/voposugi.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/18002576998.pdfIn PDF document text
    • http://colescastle.com/clients/875019/File/debubozirulemajupebif.pdfIn PDF document text
    • http://sportsbettingconsultants.net/cote_dor_import/admin/ckfinder/userfiles/files/fowaxekifokexopajusuzuwex.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/lvt56j7393sq5akeboa0t9t1r6/lezomojab.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/remevo.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7256725e40---31114339984.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/j3nc9hjfsn7phhs59o6s8un1u5/rikevex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=gta+vice+city+cheats+for+android+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_off0000ce1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE636 10876 bytes
SHA-256: f682839496b8106373ec5c40a60bc3048f6b198c0af38ef749a1994a4145eae1
font_02_sfnt_off0000ff6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6D 16740 bytes
SHA-256: b2b109ef61b4a0cd37935f6e07e79d9922a9227dc35e0c36cea0825d330469c0