Malicious PDF — malware analysis report

Static analysis result for SHA-256 29cb79d5fc0bdc2e…

MALICIOUS

PDF

76.0 KB Created: 2021-09-03 05:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2228a1f1b13015146911371ed006f8ca SHA-1: bedc0f5b4ea3b173ca39355a41778044b60471c7 SHA-256: 29cb79d5fc0bdc2ef5360021bbf9e740f7f285a882ebf04b55d71285897db213
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, including compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or a trojan. The presence of numerous external URIs and the nature of the hosting suggest an attempt to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://botosani.ro/img/uploads/file/wowoluverejeparenokunibe.pdf In PDF document text
    • https://xn--80afc2apd5n.xn--j1amh/upload/files/20654180757.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/mifawovojawusijenaliwodo.pdfIn PDF document text
    • https://tauthuy.vn/upload/files/33992581100.pdfIn PDF document text
    • http://giasuthanhdat.vn/Images_upload/files/gudukewumopimib.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/59034992755.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160c354f22ae5c---22099760332.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b67faccab---91508505817.pdfIn PDF document text
    • http://jarosi.hu/files/file/tilefunatewuxiv.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/kagaze.pdfIn PDF document text
    • https://siangyun.com/upfiles/editor/files/82413207978.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/daweloj.pdfIn PDF document text
    • http://theloanwala.com/userfiles/file/kebej.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/75414171393.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c37f64e235e---80454313849.pdfIn PDF document text
    • https://e-room.co/userfiles/file/senezilobupajujomev.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/kokikukituro.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/95718394961.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/84031647167.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6fad9fde8bc4e15f21a096b505b64bf3/fovodimirolef.pdfIn PDF document text
    • http://dentherapia.hu/files/file/wemorogifedafasuxabujode.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/xukomizeti.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3b924d4ea7a3c2a92d0148a32b566b4f/wisusuxerozadil.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/fubajaxiwatupojexubusad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=international+prostate+symptom+score+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_off0000c49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC49A 17072 bytes
SHA-256: e2d2c3aaefc04d4cf72afb8c44b737482d064782ccdad07669fa16ff41f8118f
font_01_sfnt_off0000f0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FF 10848 bytes
SHA-256: 1d04defbaca32f7b911b5dc661fac25d57de5c96b59a9a197d39df8a5a43d818

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