Malicious PDF — malware analysis report

Static analysis result for SHA-256 331dbb051092b2a2…

MALICIOUS

PDF

90.1 KB Created: 2021-06-28 04:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9e438c66edddaf9475100431978b2899 SHA-1: fb2a5728bbbc79b5b099818a48fdba95751ea548 SHA-256: 331dbb051092b2a2914850d6b434f01fdab491bcfc377860cf8076387aa62bc7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress sites and potentially malicious URLs, likely for phishing or malware distribution. The PDF structure and numerous external links suggest an attempt to exploit user trust through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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://pixomot.ru/uplcv?utm_term=delete+all+data+from+table+in+sql PDF link annotation
    • https://songhong.info/userfiles/file/46467742328.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac2c3267c2---lukopevijibazidegoxitez.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/ddpjl3v60c7pf9nj783to7o9uv/63792700712.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-27/20210527205404291019.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/ad70a0024e39be8bd989b32676d24c8f/10121544845.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e0c40857a---86420970756.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/12hg4s42bojph8412hn042ugi2/80529138933.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732bc6be202---mupizuke.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5ecfcee59---1186518480.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbd726ae1b---lizumonexabudub.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/74642471570.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b652bf38ee7---zokedajino.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/0e832121ff2b8146bf3aec76833c7126/muwilaminebojuxafisokim.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/0b754946a586f004eac92e0c1373b069/vojovelerafel.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/67269018291.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/7c5c907c4f34364464b0c31afba38410/26884767767.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/ca2a9ff6a085b900178c6fd7d79b1fcc/46757439470.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/mujtfjhn29c9uvs7mrq1hjsp02/22823395122.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/galur.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f656b7008a---43012700340.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/5ee2a987702cde955d1a0681d0dfe12b/xejuzilirawated.pdfIn PDF document text
    • http://0930actress.com/files/files/60402786478.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/k67si85sv90ktqahj6cr6dg3k1/10662133480.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160d2b1a554588---11151747548.pdfIn 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_off000102c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADC 10800 bytes
SHA-256: 3d35fa9a0a873f64afc0f9d0049b85d2b8f28d7ec6e4be473777ab384c59709a
font_02_sfnt_off00013378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13378 17672 bytes
SHA-256: 3158435c9bcd6a0839370f4f744db6800f0b5b204bf580aec2f219a0d416cf1b

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