Malicious PDF — malware analysis report

Static analysis result for SHA-256 94dc42dd1e7c00ba…

MALICIOUS

PDF

85.3 KB Created: 2021-10-10 13:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e69079c71c3c77702af69de2c96f22dc SHA-1: 355e24a7a148ec2b70cd60d1262effab6323213a SHA-256: 94dc42dd1e7c00ba1ca510be2766ed200d82ccd3a11dc59ec77f20d76d91766b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to various domains, some of which are hosted on compromised CMS uploads. The primary purpose appears to be directing users to potentially malicious content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://apexnepaltravel.com/userfiles/file/38907921994.pdf In PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/161355779603e3---diwibudufi.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/kupopurokuwuke.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/59476186237.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210928092421.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/51975434393.pdfIn PDF document text
    • http://www.parinet.fi/tiedostot/files/45912130964.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/a0fc0khootls9ufueeh43hus14/nefevukiwugaxigisulapa.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/47537760120.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614fb5b4ef205---40452813002.pdfIn PDF document text
    • http://belstroyiz.ru/img/file/95654043648.pdfIn PDF document text
    • http://easy-sleep24.de/shop/images/editorfiles/file/16149026882.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/dopimakekuzitelejamave.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/juvoxobisuvalanupikuva.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161508c9472da0---kasapuzalesefepu.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/9101696664.pdfIn PDF document text
    • https://anpheatingandac.net/nbloom/fckuploads/file/mojapuvexijiwafetod.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/nixadamal.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/77136640350.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/vefuduzula.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/digaximu.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/8163567795.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/276b3e7567a7fffa77441fa52be22dea/30461890269.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=nail+shop+on+avers+and+rooseveltPDF 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_off0000e2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B9 20060 bytes
SHA-256: 0d0a87709bcc00e98a6fbbdbf4422177a33c093282a6bf2e0b859d6a244436f8
font_01_sfnt_off00011779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11779 10532 bytes
SHA-256: d3aec44cd5cc7f12b650608cca2640565918065f7c8dc9bc0c2296f4921c5e92
font_02_sfnt_off00012f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1