Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b3700f1b4ece3b…

MALICIOUS

PDF

81.6 KB Created: 2021-06-05 02:36:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dae53b7056082f8eeb663c9322582d1e SHA-1: 186936b00e3d35646b160fd9e04872e075954cb1 SHA-256: 82b3700f1b4ece3b86fe2ebb7e52194492b34eb9e9172397cbd4abc9f567a18e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term=download+pokemon+roms+for+iphone' in one URL indicates a lure for users searching for specific content. ClamAV detection and ML classification confirm the malicious nature of the file, likely serving as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://garglob.ru/uplcv?utm_term=download+pokemon+roms+for+iphone
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/953078467c1b45cb1ccc46720b59f670/39957556393.pdf
    • https://narimasu-chintai.net/jcfiles/file/kafixijobivab.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866db62b3b8---27562934708.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608366b774935---2591261650.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160867f1f5338a---gabuguwif.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21ad4a7e0f---sedorutamogazuk.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a97da95b32e---gabonogatupenixosiwawevar.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085e8ea31e7d---bosugorovufabijewepebi.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ssals53gsqi137tie5dprqbki4/rowozizomiwinukezagolil.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/h2h38ok71clr7fjuurgh74scep/61736346757.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8950953ae---68858822302.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/1c2579ad9ffaa7a4b9fe0dec3781a377/tesipov.pdf
    • http://ytovietnam.net/ckfinder/userfiles/files/92064357210.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d18f9e35cb---68948312792.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/ebn7mgb3oba5vbsh5mqoqo7frt/60658536275.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/d8def95f33eb5aa5779e128462fb20af/vikunuritajixev.pdf
    • http://seabeachthailand.com/UserFiles/file/31754253684.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/i9dukbop0q0qfrvigvftahrdus/49035967379.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e056.bin
ab487f207bff75bfa03db9b96def99ae1c49d8abcff90c15868d961aed7910fa
pdf-font-stream PDF embedded font (sfnt) at offset 0xE056 5144 bytes
font_01_sfnt_off0000f1b3.bin
4ac5cbedf06f9ab6c41ee993db76a3e5551df4f167283787af7ade99940fc533
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B3 10660 bytes
font_02_sfnt_off0001160e.bin
8d8ec65ea93b7a4c20555eb7f914676db2d6abc72fdbc8c1c1a50597a3f7c0b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1160E 16092 bytes
font_03_sfnt_off00012ad6.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD6 4324 bytes