Malicious PDF — malware analysis report

Static analysis result for SHA-256 96079ab18d70de97…

MALICIOUS

PDF

69.5 KB Created: 2021-09-04 21:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 548cf45f079888a3d54b4004e21d8271 SHA-1: 36e4dfaa0303ac5d959e68664b8b7d1bc8ccac22 SHA-256: 96079ab18d70de974be7c80369d114755a7477f65df0f5e54ae1c7fefe0f4e0f
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites, which in turn host more PDF files. This structure suggests a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, with the latter identifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b446da5f47b---4463449584.pdf In PDF document text
    • http://ndt-tl.ru/upload/file/ravexofevuka.pdfIn PDF document text
    • http://edwardlankin.com/clients/86087/File/zigedugiri.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/87206425394.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/75567525589.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/2b78cfeaa3d6538b43b5bb01eff9f8fe/xirotowemavuti.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/dokatujimuwogawatin.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/8e84cf24dc4d9d3c9cf0df1cde0e3d8c/36916351094.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/98505171227.pdfIn PDF document text
    • http://www.moyekolodin.com/files/84651206289.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/sejinojunomatalavelabi.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/podibiluwubu.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f2d7dc7b8---pidebuzatunajenuletiv.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/pm9p8jqmupoq3gt13ntl4upqvl/62689215604.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/1538611582.pdfIn PDF document text
    • https://mollis.rs//files/27270986116.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/43405787077.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab24ae4542---ruziwimifuge.pdfIn PDF document text
    • http://agavietnam.com/img/files/kesidavonoxamufito.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/9f309e8ced521d71286bc00406e252f6/41019848285.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb43b09fd2---71979902291.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/80498709720.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/46020359091.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd25148c13f---82339539239.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=3+capas+embrionarias+ectodermo+mesodermo+y+endodermo+pdfPDF 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_off0000b02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB02B 14656 bytes
SHA-256: a2a43aefcb3bc67341fb3592e6b04f0e5b0494758d3f7c6cc41647ac1937b19e
font_01_sfnt_off0000d484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD484 11064 bytes
SHA-256: 004f2b2a9d72686db0f8c15d421835c0aebc71b25f0e7051cda40b5166906fa8
font_02_sfnt_off0000ee19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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