Malicious PDF — malware analysis report

Static analysis result for SHA-256 003df83d3d4ba418…

MALICIOUS

PDF

78.1 KB Created: 2021-06-11 20:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fa8d940c4a33640730cbb52c35a663f3 SHA-1: 546f5e614d8b93ff70cdbaf7e9d52575fa74037c SHA-256: 003df83d3d4ba418fafe05875be95a9f7c90e6a3849736a3552f1a18473d6893
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9426

Heuristics 5

  • 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
  • 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://wastran.ru/uplcv?utm_term=grade+11+commerce+textbook+english+medium PDF link annotation
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/61099ae0fd354179e81898559d4e5a9b/71556129823.pdfIn PDF document text
    • https://irantruck.ir/data/file/barevivinenedamid.pdfIn PDF document text
    • https://irantruck.ir/data/file/jelawimogutixejara.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a9e3386ba---wakepaziwigep.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4ffc3e45a---77073776063.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/70842842406.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e84ff54186---juxanarapuf.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/nawifarurusunezadubif.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/5e20020d8b99e4da3f9c431c8295e02f/foritunedejowonu.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/21776940747.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/bmv3ob59rfqmjkri19gqdduiq3/25540588848.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/05/file/202105282356298304.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160944262bcf8f---rizozaneti.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/voribuvilizosawajumarexis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/1bb3f4d8196697689dd6a06ac4d43160/44485647425.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE350 5708 bytes
SHA-256: cca8b743c02859d0b46b06f82123f474df489decba2a214056dfc5e4a9ad4ebb
font_01_sfnt_off0000f6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A0 9324 bytes
SHA-256: 3d4df19beeb27c43840e81f10c4ec545b426e36705fddeeb40bed0698a065cd8
font_02_sfnt_off000114d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D5 11016 bytes
SHA-256: 02132f4c30a55296230157bea1fe11db264d6300d791ba6f99c5f482bd43f729

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