Malicious PDF — malware analysis report

Static analysis result for SHA-256 512bae90f207d5a6…

MALICIOUS

PDF

94.7 KB Created: 2021-07-07 10:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ad13042f7f4f157122d1d77b6bf8d9a1 SHA-1: b6541cb1972110ace48e6539a080a4e597099240 SHA-256: 512bae90f207d5a6f31761e470a98f63fc248b594e04a47519bb37804ffc243e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/q884g551bj1mle0enlhugttol9/79679826871.pdf
    • http://cjatkinson.com/userimages/modujekifag.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/5c4927064239f35de981cbc03eb546ef/82570084355.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/0dlhvnf8f8bm9v9l2jqdftu7ms/mexezanarizulum.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8e39ce3518---rabedi.pdf
    • http://hilimall.ae/uploads/files/81655344213.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2e22046d9---jefemovedidezotefut.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/21bc6eb71839898a392e271620984182/davofufuvajenugaraxavi.pdf
    • http://studioagronomoserragiotto.eu/userfiles/files/fenasigojisuj.pdf
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/93506910966.pdf
    • http://icltindia.in/userfiles/file/33858220783.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/c3ee47ca37b6bf11386be9b4f070ad53/vilomis.pdf
    • http://aep-tc.com/cache/fck_files/file/25822779801.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/een7vtfkqkjjg9la15jja9okp5/xefidibagowo.pdf
    • http://gorisum.net/fckeditor/upload_file/file/fekerigosojipamapeki.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8537653f178ed2a19aca27e613cfced3/lilenepewevivejela.pdf
    • https://samowar.ch/upload/file/lavago.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c46af23e677---95456364755.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/805b40759ec27d00677bb97643c6e0f2/zekoterolisijus.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a893d649161---99067461781.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bcef1050598---92460751093.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aeb5433554---41904081766.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/f3aa43c34edd19f7a26076d92ccab110/xirerogozewoviseneputax.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+find+the+angular+momentum+quantum+number
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f60c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF60C 16792 bytes
font_01_sfnt_off00010e23.bin
f55d76c7237981b33ec5a1b14c54ea97a62a5fe3c0c3b61eaa68e69caa85b2d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E23 11096 bytes
font_02_sfnt_off00012732.bin
a5d6fe8d66896532b5e14e598fe4e06fb63b8c3a997ef7ef288f1ce4d94d7d1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12732 18116 bytes
font_03_sfnt_off000156ff.bin
1cfb00680a8a18ef5d5af493cc5b57cfe410abeba37087ee2ecd799c98b61e68
pdf-font-stream PDF embedded font (sfnt) at offset 0x156FF 16168 bytes