Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a0e340dd82c462…

MALICIOUS

PDF

81.5 KB Created: 2021-09-18 07:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a8c62a1a341520d4fe786c3656f3fed9 SHA-1: 32fa0bd13e2a4a19e45811fee34b53bae9d3e0b4 SHA-256: 01a0e340dd82c462e8e5b33140f9a066aebb369e99605bb82382fdc5abab088d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute traffic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://bloc-immo.com/images/98031199625.pdf In PDF document text
    • http://mrs-edu.com/sribati/editor/uploadfiles/gikukevuk.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/7a593d109e77e6cb5cd921e91ccecfc7/36429328307.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/89424719289.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b38ced5587---60280002255.pdfIn PDF document text
    • http://lex.tj/img/file/pezivijexogupuvuva.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/81615607153.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///59381108946.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/jetataforofimidexafiwu.pdfIn PDF document text
    • http://bluebossa.pl/files/file/66617829761.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/ruluwededi.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/71240820735.pdfIn PDF document text
    • http://techbico.vn/uploads/image/files/xafagepig.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/f8mr9fgd5e9uv1kq07tjfjq037/2409735485.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/091327fa7528e731896995b29bc1478f/24645206701.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/67864942876.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/guxomaruroturovabutu.pdfIn PDF document text
    • https://unaizahic.com/Files/files/raduxewoxawod.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/rpb8ar1ee7k279f5bjsiq942hr/5170073134.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/ziliberemux.pdfIn PDF document text
    • http://businessvaluationapp.com/fck_files/file/71621185503.pdfIn PDF document text
    • https://salondumariagededijon.com/userfiles/file/42209168581.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/tetuvugaxebelowulis.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/lamojenaf.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/bawepunalaxaxuwujareg.pdfIn PDF document text
    • http://janaturismointegrato.com/uploads/file/ridovodetegozokuved.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=girly+wallpaper+for+androidPDF 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_off0000db4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4A 10464 bytes
SHA-256: 8030b0895e698150c73db5ff290f61b8078624e1eae0fb997e3ba36bea7a3426
font_01_sfnt_off0000f32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32D 17548 bytes
SHA-256: a6ef059d53385cf4034fe7a977df81c84e97afd84824ac7e8642867e3c02f4a8
font_02_sfnt_off0001207d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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