Malicious PDF — malware analysis report

Static analysis result for SHA-256 78084680e76edde4…

MALICIOUS

PDF

77.9 KB Created: 2021-08-14 01:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 441f433970b804d45963727c8f5e9c64 SHA-1: d0a66b2687dda544b78da94e30abbf40927a2043 SHA-256: 78084680e76edde4d8d0f47cf27175c3862783518ed2eb07b0c9aec40e9d18b3
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to compromised websites and potentially malicious PDF files. These links are likely intended to lure users into downloading further malware or engaging in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/2c2450a048aeaf45cdcd80ee86c01b7a/wajowumemapodutumonametog.pdf In PDF document text
    • http://alexlunacoach.com/img/editor/file/jepizinupatazimijejukud.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb079de98d2---202474832.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/a29e3ead77851f681bec1e2daf48d9da/pubuze.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021061516505150.pdfIn PDF document text
    • http://milkexim.ru/imgeditor/file/dumubomatadudilifemubow.pdfIn PDF document text
    • http://zhuoer.ltd/userfiles/file/vixafoxudadegoje.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/99594896357.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/6338432661.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/24145713838.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/razogaxuxip.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/nejofarepobofopa.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/6b8e97615ff88cd1c0e2643990efe3e8/wuxeloxudezutigu.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/pizoj.pdfIn PDF document text
    • https://5udua.com/contents//files/85298193641.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/kodofokelotigosopibejak.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d7b923283---81638291464.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/5855545263.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da6cd900bcf---lisabozum.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac617a68340---80418825437.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/78582525535.pdfIn PDF document text
    • https://ms01bet.net/contents//files/puzerodukamixezesas.pdfIn PDF document text
    • http://mail.teleserviciomalaga.com/ckfinder/userfiles/files/botumajabonebuji.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861509ccddd---16872959964.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fa3e340b6---puson.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/61623100521.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/busuxugokinukamov.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/62097533361.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+adjust+a+briton+1003+door+closerPDF link annotation
    • 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_off0000c8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F0 16904 bytes
SHA-256: 4bb48e559a10c87f0da469e7afd2a409d97f66cb444f6c9f6eda978b7e8cfb6b
font_01_sfnt_off0000f4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A1 11156 bytes
SHA-256: d794576db4e259ca7aec7002c2f09f6ea720d46decfe91e2a7a09876d01e3963
font_02_sfnt_off00010ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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