Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ccb7d9c901c9857…

MALICIOUS

PDF

225.5 KB Created: 2021-08-20 21:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 411be253ef6986edb1f81b81d05cd376 SHA-1: 8f68860c96461dfe4e3267c26363500a5a6a567a SHA-256: 4ccb7d9c901c9857c379fa817d39578b74da5f97b888d7ae3eb7d42e1622bd03
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9773

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.
  • 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 http://studionegro.net/userfiles/files/51125505142.pdf In PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/zuputorolexuxonuwu.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/zabufigukovofewija.pdfIn PDF document text
    • https://ebooksweb.net/files/file/94914040079.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/wedekozevikasatos.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ea1ea4cd8---tatijab.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/9q1dvnceh9u6ag40apsht6fja6/bikajodomugidopej.pdfIn PDF document text
    • http://hungthanhauto.com/luutru/files/75279479901.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075fda786024---95141810893.pdfIn PDF document text
    • http://drtamerturan.com/file/gulupipaxarivukefeka.pdfIn PDF document text
    • http://jaatkinson.com/userimages/wupilabitut.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/ea115fd1d581a08e6eefad40d1ace3bf/95409458709.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/1025685b964707942078b1f2b0aab45d/58045632820.pdfIn PDF document text
    • http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/65178631425.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/21c622b020bb37e9ea70adb95e47c11d/92202654835.pdfIn PDF document text
    • http://ehs1958.org/clients/73155/File/78568186269.pdfIn PDF document text
    • http://omni-links.com/images/blog//file/1284241299.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/bf6df777cdf0e287fec8482a740fa465/65751637438.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e975d16941---84101539893.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/wogulezogetakafu.pdfIn PDF document text
    • http://erfaspot.com/resimler/files/69051813449.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/ronamosafi.pdfIn PDF document text
    • http://wongkungfu.ca/clients/f/f5/f5c316b966f29b3192b3e9e3c5714b3c/File/lovavuwukunasuzupo.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/b122a6e0f7174d507f8abe1467f795ff/zuwiresevowulilafegezud.pdfIn PDF document text
    • https://olterus.net/contents//files/lirazazukumubajezegeno.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/ae472ed2b3e333bbe68461bb660f0390/boxug.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/zeforevapegifadaxen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=saber+hacer+contigo+santillana+5+primaria+examenes+pdfPDF link annotation
    • 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://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_off00031190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31190 11520 bytes
SHA-256: 132e3415d24e95c44cd2173542b3dcdfa06fb2a89c082f4aa326b3fff5001a43
font_01_sfnt_off00032c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00034457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34457 19020 bytes
SHA-256: 9c75b6368e6d81a5dcc2c8fc75eb22a6cc560e03ed44d58412ac9e5666f9b8bd

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