Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a0e199eea015a6…

MALICIOUS

PDF

88.2 KB Created: 2021-06-19 11:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6f00cd0fe49872267085be3548b83597 SHA-1: acb378b4937d06f4012885c1786a7d80865b7781 SHA-256: c0a0e199eea015a64fdc92731dbdd40f12238b61256b1a2fdd39809518330124
156 Risk Score

Malware Insights

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

The PDF document contains numerous links to various websites, many of which appear to be compromised CMS uploads, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://saovietgroup.com/upload/FCK/file/fesalurusiwodiworujin.pdf In PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076db72cb5ad---bagulipobevaxelor.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//zopeda.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cff849f09b---tejivokafapekororaro.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1607e94ada143c---sufuwolo.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/38855255874.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/naralowixamarix.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/9038657a9c08e1c449a2e9c2f8ea53ab/tosexobuxuvokukaxaga.pdfIn PDF document text
    • https://xn--arbeitskndigungsrecht-best-5zc.de/userfiles/file/88959928620.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/9386251693.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bedcbb0f08b---98717028778.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160751091ada27---maxudutulitamifula.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/11895701714.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/qc9q0g9e47lkjnrs7o138cv6ev/jojimelepetabali.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/xenoxibojalozeze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=pokemon+let%2527s+go+eevee+para+gbaPDF 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://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_off0000e909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE909 5180 bytes
SHA-256: b1e1e93543475f4ce2f805e86573ab0253d74de5da83558ba2c5732fd2fea140
font_01_sfnt_off0000fa8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8E 2168 bytes
SHA-256: 8bdf6fcb4554fb9554b7b5ec071e6942571bdbb16a8311c1d4bc123deacee0e6
font_02_sfnt_off00010493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10493 12912 bytes
SHA-256: fbe773ef470b09ecabc1bf5788de1c56f643a0d5f5683e4f85a32f1d71d056f0
font_03_sfnt_off00012e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E07 16288 bytes
SHA-256: 400656400622bc45823ef584bf92c81c422ba1dafe563976eb8d1d89122a2f77
font_04_sfnt_off0001438a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1438A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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