Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d7e38d0c1fff33…

MALICIOUS

PDF

77.2 KB Created: 2021-06-11 12:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 05a3a2345df4ea370c373cd97d389b66 SHA-1: 5e89513cb9002b50619c043836fde1045d362804 SHA-256: 64d7e38d0c1fff331c47206e6be5fd7bfcc0ab214c7e4be202f6b951512e3aab
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous embedded URLs that form a link farm, directing users to potentially compromised websites or malicious content. The presence of these links and the overall structure suggest an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=evil+spy+school+reading+level PDF link annotation
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078e4d1af879---52163354145.pdfIn PDF document text
    • http://biomisszio.hu/tmp/89715942683.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/176190f7b35edb66a8fc275500fc6af8/33825902625.pdfIn PDF document text
    • http://northcity.rs/slike/files/36224807654.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160807c7879d26---27265916458.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a71367d1049---81533302336.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/u0isgv8cv6nvo1i179374tan7g/totusikevibez.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3657e4dc20---3203624200.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82ce281649---20832775599.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/ragivopexumun.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/429734e67794b30a66440ceed75cf533/ratitebiwanudinera.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/31144396226.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/a500a20c2f0b70207de984596b22b3af/xaludorit.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/oqa4qe9n8emimc0r75pas1i2m2/ranew.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/16dc5f15c64bc6c2105dcc406e84256c/9184539391.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/34857583398.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF32 5452 bytes
SHA-256: 770d4aab42f2e3847bce78c42638b8dc418f352453c98181522691c4d370599c
font_01_sfnt_off000101c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C7 11408 bytes
SHA-256: e6ec4bae65cc2ecb0a8a37eca0a1942fbf11e3b6902d664133926db80e18a86d