Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c5831c71732579…

MALICIOUS

PDF

87.4 KB Created: 2021-06-09 04:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 07f49b112f84e9673a4706c2bedea916 SHA-1: 5f40b3351f99c1d8556b5a093119e50c505571f1 SHA-256: e8c5831c71732579fca3585edad518bded2e85a111d2f00edcc75fe3dbd53d73
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://wastran.ru/uplcv?utm_term=love+dragon+in+dragon+city PDF link annotation
    • http://driscollandgibson.com/images/edit_images/file/tupupatigujewevovij.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/buvikepaxusudunotizav.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/d7j284f64289ntt5v7cjdfkcg0/77193075225.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1280de0e0---nowajeperimoge.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/nafopenej.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/imhv552rgmom9c5pcrvcs5lu51/magazuvaveboredaborifag.pdfIn PDF document text
    • http://sparkpro.lv/content/file/geviginosefeten.pdfIn PDF document text
    • https://songuryazilim.com/calisma2/files/uploads/30896637456.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/debobididu.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b2d61dc70---75512491669.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d9546fc4e---wogetate.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/1ece4cb1192ba07ab74f090b7dff1888/lejadawazexilojiruro.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/2hgoq02acuqobgj4uacifmips3/melozowusegigetari.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f13474ea39---2502829283.pdfIn PDF document text
    • https://mmszke.hu/files/file/dikoka.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/160752358917.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4bcb49dac---zekili.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609c99cd6c8d6---lomiwomikogutoreludurelu.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/tiniwitolidodogevivut.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF751 5000 bytes
SHA-256: 247f45ad61f704b0be29fb65f7790411b58dd9d0b86a68e15625d5350e6320c5
font_01_sfnt_off00010876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10876 21456 bytes
SHA-256: 9f54ab0ab8f1fa9a6c92675020e12dd275de59e302959c26442d2e13a3a850e4
font_02_sfnt_off00013aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAE 16312 bytes
SHA-256: 975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15

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