Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d10ae080534fb6…

MALICIOUS

PDF

86.5 KB Created: 2021-08-07 07:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 595a4d2c2b045c5b442db07a9adb41ed SHA-1: bd250588ddaf168c967ef175963351dc5b2d1a64 SHA-256: 04d10ae080534fb6dbdc41e8a32f57254dc73a51e4c0d0b36f4951ba5006d28b
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://prograsifkalip.com/files/81872407703.pdf In PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086398eea9b5---kijupimemovesa.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/38169978810.pdfIn PDF document text
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/tujedidi.pdfIn PDF document text
    • https://magerp.org/upload/files/14772265147.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/33881678929.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/81884f93ebd1ab434ea9eda0f13348bb/55560056488.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/17f4d3d5ad648d70267e3428dace87cd/43891133006.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/tutezoguzixububil.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3e6888a8c---futagigenufozifigefupof.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/tinujaxafunaveralibasorot.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/rjtuor33i0elsujrik42g66s8s/revawibibodekowo.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/d6af7873362944eae904eada3d37c210/gutikofuzilavifofozo.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/51090814145.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/16662649751.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/74139111231.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/cc17a41fde44b0076d168a462112018c/nolerirajiguxasinudise.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/5s5qiqqt1ijcvq89oulksk50cr/zubitipebizenadus.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd5e9fbf7a4---navilerijukajexegud.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/3c7918cd7a2f2946cba3614877fe74d6/xexemadaviseru.pdfIn PDF document text
    • https://dietacud.eu/upload/file/fejosasunonawasebelip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+the+role+of+information+technology+in+instacart%E2%80%99s+business+modelPDF 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_off0000e8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BE 17916 bytes
SHA-256: 1ad187ba73789bd2bdb61f9697f9028ad2071b6788fdb18a52307012e378f649
font_01_sfnt_off00011693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11693 11324 bytes
SHA-256: 8abd784a6066fec30fed826b5f0f82887b76a45fb63b8c7e40e2808e842dbb09
font_02_sfnt_off000130ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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