Malicious PDF — malware analysis report

Static analysis result for SHA-256 6545deb37f51c91c…

MALICIOUS

PDF

95.1 KB Created: 2021-07-21 00:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7081b31c8cdfaa86d48f084af8e3dcf6 SHA-1: 4a5ad8e788f868727012f49a52f738eb84636203 SHA-256: 6545deb37f51c91c522e3237125b0808bcbfd5e3c339a59f9f31d5ccba25cda0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is unreadable, but the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://a2designbg.com/userfiles/file/pafejepegonoropun.pdf In PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3064e69ede---94565633780.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/c91ea598f19fd07ce5428ba521372a9f/mevafikuli.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/25848772185.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/musunuxefizatage.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/66282789744.pdfIn PDF document text
    • https://mbbs.hr/files/vefabolikevetur.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/9a3b4de09858409615fa698bfa26caed/47335404993.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/pd2r3uvj0ej4rme49m2qv270ie/gebukazunelevanimis.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a67550299d0---79428021185.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/57948555716.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/kijodavawusukitamigagino.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/70f5f503a779a65fb84f14591b974794/zozifomutuzibebavolikep.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/3096677249.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/boserq04m7rcg7b1cndrpo8qt4/wapowen.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/2e2b37dc4e14ad0a71b5ca4abc96c648/43890907589.pdfIn PDF document text
    • https://bursac.net/userfiles/file/kurisukanotofa.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2873a6f2dc---16122768057.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-4/20210504073734236208.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/br3s25v8ktklogdjkumnfmt969/44667298842.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/temepuzafinasutuj.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608882908391c---degofutojonenowesenusadab.pdfIn PDF document text
    • http://vlajamo.cz/images/file/gewumapijom.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b60d1bc6c---60200997972.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/vonavewejav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=albinism+in+the+classroomPDF 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_off0001116b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001297d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297D 16856 bytes
SHA-256: 6445e3d6c6dd90d63fd8b5bc0d34e3a07a7084b4e8dc8bf34da5984e15b73865
font_02_sfnt_off00015573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15573 10616 bytes
SHA-256: 4444316834ebeea69297e9eb92ec0734563704cd59e5c2ff18d00bc43a5cf6f7

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