Malicious PDF — malware analysis report

Static analysis result for SHA-256 3067d5fefa53dce0…

MALICIOUS

PDF

84.2 KB Created: 2021-09-17 17:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1fbb4c8e273951130fe5d4d54ca852a1 SHA-1: 75f59d8a09018d8487410fd1cad51313eb2efd80 SHA-256: 3067d5fefa53dce0715c2d2845af396c15ca057dfa37f2c3f9b4a72dd2ace328
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure points towards an attempt to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://oniceh.ru/uplcv?utm_term=nonton+streaming+kimetsu+no+yaiba+mugen+train+full+movie PDF link annotation
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/420951dc4ecfae3897d391e58046600f/putazulomufevanalajoko.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/92096570807.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/93220866800.pdfIn PDF document text
    • http://satyavnetworks.com/fck_upload_images/file/42614776204.pdfIn PDF document text
    • https://www.benkorner.nl/admin/library/ckfinder/userfiles/files/jasuzulijawiwup.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/sofukuv.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/pixizegerijuzed.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/kenaxusan.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/28975944435.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/befukuwila.pdfIn PDF document text
    • https://spcinternational.in/ckfinder/userfiles/files/20853073183.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131633dc7e05---82901471222.pdfIn PDF document text
    • https://eurosan.pl/user_images/file/99340380245.pdfIn PDF document text
    • http://jlsxjy.com/right/UploadFile/file///2021091118174173499.pdfIn PDF document text
    • http://personal.sut.ac.th/chantira/port/ckfinder/userfiles/files/dubijeliwanerefivimekuwu.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/hi9lhpkjsu2qqkeqrf977g4pjl/roxelaganazigib.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613364f8cc327---zotafuzigakeduni.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/334ba73f47199544ca4bcdff70363a70/wakibetenaremaben.pdfIn PDF document text
    • http://aromacosmetics.bg/assets/userfiles/file/66425476414.pdfIn PDF document text
    • http://avs-market.ru/admin/ckfinder/userfiles/files/87391964955.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/77eca92b24928ef51e7df9a379a92ea2/86348473215.pdfIn PDF document text
    • http://rafaelokazakov.com/file/xigevemufefekiwefaro.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/81166500675.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/97d2e946ab6a089ea542e1d2f8bdf9d6/taladipibuxozifugolikole.pdfIn PDF document text
    • http://italy-ex.com/images/blog/file/36192974111.pdfIn PDF document text
    • https://mar3ol.com/Files/files/kenileboxifonakorutuxusux.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/161345d4b6e3ea---newanexaduzozuvur.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_off0000e343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE343 11048 bytes
SHA-256: 2000678e1615554ad33db6ca14198b8e4e2a87b4b0b86691b03d8c4dee4e376f
font_01_sfnt_off0000fd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0E 17452 bytes
SHA-256: 23d05f37bbb65a07c845a7d6c94c51127451067b71b056158e3daff4f94f142c
font_02_sfnt_off00012a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1