Malicious PDF — malware analysis report

Static analysis result for SHA-256 472d3f08aa7a4f15…

MALICIOUS

PDF

85.4 KB Created: 2021-08-18 01:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 462a87ba362eefb1858e2da3f7184a99 SHA-1: 75070bb521f13bdd53d65c4eeb0bc63b54c1c35c SHA-256: 472d3f08aa7a4f155f545eac4ac3e22808e83b1222dcece85d28a45ee91d56e5
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huntic.ru/uplcv?utm_term=pitch+perfect+1+full+movie+free+no+download PDF link annotation
    • https://editionsitaliques.com/userfiles/file/giwajeveful.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/jofuxosavadebebamerij.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076352989ccb---44366940209.pdfIn PDF document text
    • http://gokea.org/upload/editor/files/zuvolufiwibarexise.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/makugezejexujes.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c91b0470ec---filubanonisemivogipoku.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/ql8n2tvl72gceg651rrr345b60/jerilegegulaninorusakabar.pdfIn PDF document text
    • http://sbcnepal.com/images/file/99185690808.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/88107872895.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f407db81f14---xemezuvegipidekozimo.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/fuporupewonez.pdfIn PDF document text
    • http://mebco.ru/images/file/13268280137.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/04be3662c3ed0042b9701f91336db061/filufep.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/resepubemolafamotuwone.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/59f00c9143804bdc7e82a7f837667f04/xejidowudepopemumovene.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/zuvabuba.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a896f6aa11d---lerovoketapufis.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b865ac3a0b0---lamokizuzevivitedare.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c31aab5975c---70786808220.pdfIn PDF document text
    • http://wildzipper.com/clients/wildzipper/userfiles/file/mutiborifefegojakoza.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/ligevogizedi.pdfIn PDF document text
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/sevivularogikakaravewog.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5c709c627---46454842108.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/4f557ac35920aaf130b7996af00cc839/numizo.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_off0000e92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92E 16904 bytes
SHA-256: 82fea30724eb93a0463efe749800f1a5d9068904e2beebd36699838611b673fe
font_01_sfnt_off00011508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11508 11020 bytes
SHA-256: eb31d12e994cb99fc87766aad3492dd382ea7751f918be03b8b770ccc22ce1dd
font_02_sfnt_off00012e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1