Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08ebc640847e44d…

MALICIOUS

PDF

286.5 KB Created: 2021-08-01 07:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 77a36fca777d944de1060d29706751bd SHA-1: 24eef43dc6cc68a94edd8c9b3c4241c2a8426c4d SHA-256: c08ebc640847e44d96565835a50295afc51ec2cbea5adf4d736063244865d52b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of these links indicates a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9770

Heuristics 5

  • 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.
  • 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://tjjjsh.com/uploads/files/zibatadusidevoxapedidab.pdf In PDF document text
    • http://vladjurnalist.ru/archive/file/4272295951.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/991356f151713b8438adb2ff953f54f7/93763142137.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d8b252e44---11501337306.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/64489038069.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/7048832d32d019c29184b344d0fc2630/93260179869.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/ritokari.pdfIn PDF document text
    • https://lochoanggia.com/upload/files/natunuwifu.pdfIn PDF document text
    • http://arablift.net/userfiles/file/28776721706.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/korajaberasetuwazakaxiri.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/d49eehbnhj6e9ildr7ch70nhri/vunuzi.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/12853872808.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20217311242341504.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/foxagagasefukogilinik.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/84378048145.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/h54c558lnt10k82iclq6j4cvda/nesirilixewopiguvidutimo.pdfIn PDF document text
    • http://adveotec.com/img/file/mejupuvasavunumavek.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/fe281f9f7f03b62982ab558da9f585f1/nigegowazasibodozujed.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbfe789f86---58150129448.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/mifej.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/f957c0f0d7c6335370ee32865ec88410/kojugoxutebatixaxifi.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/latv0up9j29jc01cqtln8u9j60/mutakun.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/votajawevugebode.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfc4eb1400f---25412689449.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=what+gaba+receptor+does+alcohol+bind+toPDF 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_off00040597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40597 19540 bytes
SHA-256: 348d073d6f0053c0ec833c694fbcac8afd2a4628d7125da304f240514620c091
font_01_sfnt_off000439aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x439AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000451c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x451C1 10928 bytes
SHA-256: 8f5886608e0304561c27a7f79723a05af5934abe63ec874ce9df547046b81f8f