Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29bf5f2fc215331…

MALICIOUS

PDF

90.5 KB Created: 2021-08-12 11:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a3d1884735acd4282a946293bd4cf53e SHA-1: 36d25efcd3a4b4818a897784753d6b6a312b3aab SHA-256: e29bf5f2fc215331d674c2d909ffd312f273b9e9327eaa3d096fd1d30921b0b3
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely intended to lure users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ketchas.ru/uplcv?utm_term=anaconda+1+full+movie+in+hindi+free+download+720p PDF link annotation
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae06481b9a6---vepujigilapewedujedozi.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/51103486865.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210705042937.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708cdfc4ceb---63711772055.pdfIn PDF document text
    • https://lavaecucebrescia.it/file/mufenesegitabi.pdfIn PDF document text
    • http://fotomil.pl/ckfinder/userfiles/files/febagitob.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/356o63802s74l38lsp21i9r3qj/bozisarovunadazosiwunawam.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/6c0b982571fbd6cb591c51744859f356/navepurofexigam.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/tuziguwetakojisokafatova.pdfIn PDF document text
    • https://csodamalom.hu/files/files/19658984597.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/ff57c438dd5193791e56d64094052940/gujixiwe.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/lewagiruw.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c64a1ec01---33936905312.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/gevufidagokomunaresosot.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media//52139183556.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/ac8795cb7877b327ed8c539bd76080c0/31719245008.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/durekabedugupajusid.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/51347238304.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b99b8f3551---jujuz.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/8vgbbtek6nompgns3ldhu4i2cu/pijibewusovow.pdfIn PDF document text
    • http://bptramptour.pl/files/file/wigugonoxukijaxib.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4c1db5960b---87384546749.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/35827311704.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bccfaa52eb0---18978480835.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/22371672214.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_off0000fb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8E 11196 bytes
SHA-256: b503c11bab42dc779d16b1cfb8c63e35b26255498ac53c9efef24dd9fff1bb15
font_01_sfnt_off000115b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B6 17000 bytes
SHA-256: bb8f9edf49a34fd1d4b6488d56c25e4ced2d854fd340b943131ca2c6f798f59c
font_02_sfnt_off0001422e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1422E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1