Malicious PDF — malware analysis report

Static analysis result for SHA-256 164c47d3d69d0772…

MALICIOUS

PDF

77.4 KB Created: 2021-06-11 04:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7335e90b65180e7454babe0a35b75664 SHA-1: f48b394fc76e95e7d7721bf2fda3dea876824784 SHA-256: 164c47d3d69d07721039369f92c03ce531311cf58761a92e64f3b841fee35039
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute further malicious content or phish users. The presence of external URIs and the nature of the heuristics strongly suggest a phishing or malware distribution campaign.

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://chcial.ru/uplcv?utm_term=kalyana+then+nila+mp3+download PDF link annotation
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/1ed86902a6c56b9b78a7865349c4f72d/21733332191.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087495edd023---nexivi.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac0881d299---37078202114.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d8a6a3739---fitavidaxewexoxifozijival.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/28643698295.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609455a7a33e6---japataxulope.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f24d858d76---92121229118.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2a845a6de---kegafilewon.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb476fe2b38---dorigepubajujojuweser.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078147ac52c7---zajoxeropetasanazoge.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcf73485e5---mijekabedonazufe.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ce012a0881d2c28048a83d6530977448/pevuwomajekoga.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/15289024628.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/gutimiboju.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/naqsnhamavl48otgehvk22ql0a/ritamutizotojelezebe.pdfIn PDF document text
    • http://sarlampa.ru/upload_picture/matifinamuj.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/82248839321.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A1 5252 bytes
SHA-256: 607c09ead97ff2c50cb80d61e8bdbcfa75797b9a5c5b5418ef3ce81cb7dde98e
font_01_sfnt_off0000e675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE675 4408 bytes
SHA-256: 67a0aa0726dc4423fd672dde5025aa9654312611c777b2b0a7c758152c6cb09e
font_02_sfnt_off0000f59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59E 3956 bytes
SHA-256: 8ebcd6aa0ecf171f505dff20da1ddd71af3c35d1ee0dbbf09f23542a6522c0b7
font_03_sfnt_off000103e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E1 10444 bytes
SHA-256: f0e70c9be9922ec4103e78fc9e02a9ea3433e98675d07e5401bc489ae3693241

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