Malicious PDF — malware analysis report

Static analysis result for SHA-256 e022613a217703f9…

MALICIOUS

PDF

92.0 KB Created: 2021-06-12 06:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6b394666fb14adc70959b440aa7ccd12 SHA-1: 292a823cf629a32134807903d41c577bb28d68fc SHA-256: e022613a217703f90d9eb4cedfa3f3c04fc980db44bcca98cea6ee8514805164
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 0.9995

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://infrive.ru/uplcv?utm_term=stonebwoy+shuga+download PDF link annotation
    • https://adasms.fr/userfiles/file/fikokude.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/snk3254tj9opgfpmrbhi2lgfke/60592557094.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce36673b33---88550517938.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf1d257e6e---nesafuz.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/1694c05e48f49cd908d1965ac123d7f9/50361440088.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b99714fb8---zunutidi.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608aefc430c01---27005805983.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/e4689f2d9afa0c47f1899bcba37d1fa7/67121540245.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160af721c8552a---boged.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ac81aa1f3d5---10148734451.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1d323bc6d---toxukapekuzutexiz.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608f74ced69d8---pokixugalezugujanegi.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e47dd6a224---putejitajipijonovivibojux.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16070cb6be2ce2---76712970549.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96B 6872 bytes
SHA-256: 67e79166eab99d58c51b5605e0c69db1c2aa8670a9cd790b21b3c493144e1e5e
font_01_sfnt_off0000fac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC3 5428 bytes
SHA-256: af7d4cc8b9e2d55b2d26f25f582793a56299fdce9fc60cf3126f131d9e014135
font_02_sfnt_off00010d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D45 8376 bytes
SHA-256: 649b7be48a92870f8c81b9ebbaf9b20490d3147ba492cce829cbd047392e15ee
font_03_sfnt_off00012429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12429 12060 bytes
SHA-256: 10dbd9418677dbdfbf551dafab294addefd1f870fb53f13f46e4ce9a944fd15e
font_04_sfnt_off00014d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D6D 16108 bytes
SHA-256: 2fe535f9c097fe27a706aa3ad62527480cf572bf1989d3785b3ce3c5884043d2

Open this report in the interactive analyzer, or submit your own file for analysis.