Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0fd9a95f7a0991…

MALICIOUS

PDF

86.2 KB Created: 2021-07-14 07:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6fc6ee4c35554481953f5e9fdf3441ab SHA-1: 721a41de09d6967ef0bd6f83f18801a519863bf3 SHA-256: bb0fd9a95f7a099100710f3b7b7a5cc7ff90fee43a272620eff203d0b5fdd9ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://cructi.ru/uplcv?utm_term=stephen+m+white+middle+school PDF link annotation
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073215e9fa67---46547649720.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/86821768272.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b5b6a235e---15742025254.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/76677648294.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a82ae745291---33798006528.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/dufavabigipiratemobosobel.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/wigefejinanuvesikajibab.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/maxedat.pdfIn PDF document text
    • http://megalaserasia.com/upload///pemalipeva.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/68538308508.pdfIn PDF document text
    • http://www.nagsa.es/ckfinder/userfiles/files/44475596087.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/5ab1419f6272c05219ddb9bdcdd868ff/bivizasogapokufuteke.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/zavekama.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/dimemixefun.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/23012958572.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/fugegimin.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc939e5593---61775153735.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/46235518414.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/65313843235.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/ofjf7e32ne4olpuhkegq2699ao/9716895496.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160af825c7f78d---pukesubunivamuni.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6232bac36---widij.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7e47a40db---nimunavodumo.pdfIn 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://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_off0000eb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1A 17716 bytes
SHA-256: da54d0908b37f646ed2836b1611ac2654282a70eb0a2e83387eca12d23cec0d0
font_01_sfnt_off000119e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E5 10680 bytes
SHA-256: 6a0919826caa05ceac7c5e49beb5f8e02ecb0cfa4f36bd2ccec781e13adc5631
font_02_sfnt_off0001322f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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