Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0bd1718ac52a1e…

MALICIOUS

PDF

102.4 KB Created: 2021-08-08 18:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1a1a119e084162fcd117f41c2576e5ec SHA-1: 370d29bb98c3570ba8e7b26d395eb1713ad788c1 SHA-256: ba0bd1718ac52a1ed1a244b930d278ef11a524a98d7561907e8824c6175a79d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous URLs, some hosted on compromised CMS uploads. The primary purpose appears to be directing users to potentially malicious or deceptive websites, possibly for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is leveraged for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/6770288d5201492910fbbf59b145ae82/82789693143.pdf In PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/61481492310.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/lulevugugimopugeregar.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/beponajoguzidowawavorax.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4a2499025---38661847919.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/fogunugiz.pdfIn PDF document text
    • http://bertolinacare.it/file/22197911810.pdfIn PDF document text
    • https://www.domaine-vrignaud.com/ckfinder/userfiles/files/joxeguwe.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd8b24c515---72829435993.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/1673023232.pdfIn PDF document text
    • https://drosamahetta.com/userfiles/file/51606865833.pdfIn PDF document text
    • https://codecs.ro/images/file/zedusanebabubo.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4550e7430b---70564357940.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160c5df078dda1---miwulawobizepuxifes.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/e6ce1858b92eb6d2047d3fb7574570ea/nedepegurajijusaj.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609681490cb56---didifezuniguguxalewujojul.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/rpadtvufakai498qbtvfqk56ce/96067930672.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/99283133114.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/vaberikikuxox.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/dovowef.pdfIn PDF document text
    • https://t2sc.me/userfiles/mowef.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/165c5f7878a1eebcf2d767c92c0f084e/27092272303.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/5ad07b06d48c58dc3d2b92f5617637a9/76003231542.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/47062219085.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+much+does+average+kitchen+remodel+cost+ukPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/bcf2551336b638252cf5fec64131afe5/xopewumelej.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_off00012b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B76 16884 bytes
SHA-256: d4511c0e029cfb1e81e3551c2013184ec92243cdb068de095a026cfe10b81f5a
font_01_sfnt_off0001573b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1573B 11152 bytes
SHA-256: 65f4dfe616cf26e90717ddfe3dbb163761b7a48477f4d8dcd76d2d200d7190e2
font_02_sfnt_off000170f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1