Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1195bd88a6894c…

MALICIOUS

PDF

60.9 KB Created: 2021-09-17 03:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 02b1ede5e2284014609fded7a2f3e616 SHA-1: 69b6ae07bfedc12b1a3909031f6aacb635e61ab3 SHA-256: 1d1195bd88a6894c362f89bb96a8d07195ea2a8324998106441dc98a9d69d749
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The presence of external URIs and link farms suggests an attempt to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4874

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.
  • 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
  • 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://irlanc.ru/uplcv?utm_term=the+ragnarok+2017 PDF link annotation
    • http://marienoellebermond.com/img/uploaded/file/xerodupobebusekibolipitu.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/kerani.pdfIn PDF document text
    • http://tucsokszekszard.hu/images/news/file/99118794416.pdfIn PDF document text
    • http://saraswatishikshamandir.com/singhania/downloads/file/papowoboxoxokolu.pdfIn PDF document text
    • http://cybernet-ap.com/UserFiles/File/rivoganuxotapaxubevizuz.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/28880584018.pdfIn PDF document text
    • http://shortguycentral.com/ck_uploads/files/bilagom.pdfIn PDF document text
    • https://nenmongdangquang.com/upload/files/28621720505.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/67847151083.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/48657521848.pdfIn PDF document text
    • http://btsoft.vn/uploads/files/20817935256.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/38053801178.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/50998115985.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143d879d1a59---fadutolasekajapatatu.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16139b2195657b---18104603206.pdfIn PDF document text
    • https://valergences.fr/userfiles/file/56690761280.pdfIn PDF document text
    • http://dison.cn/filespath/files/20210913181314.pdfIn PDF document text
    • https://topupdana.com/contents/files/68668542262.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16132a1fcb529f---42243034989.pdfIn PDF document text
    • https://luminex.pl/upload/file/622519072.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161404a653e352---wused.pdfIn PDF document text
    • http://derp74.fooden.com/UserFiles/files/41654517705.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/lifunisipoliporovokesuduk.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/66197305952.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/rajosijezuponipuvolejapug.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/kunipuvaveruworexuwekobin.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/668b17f0cd1e9e2794fe06146e8db1bc/nuzejifogupuxagamixom.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2B 10380 bytes
SHA-256: 4729688a17847c2815c532f13c47349272f007bde0f401bee89b90e2533f7bb2

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