Malicious PDF — malware analysis report

Static analysis result for SHA-256 75dda0c082499ece…

MALICIOUS

PDF

79.3 KB Created: 2021-09-05 05:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f3eeea89c46f7c2652cfff20ca8ea606 SHA-1: 55ea8146d17c775c3328c7b9a66f77ea288c7f88 SHA-256: 75dda0c082499ece1ab840c6221d0c5bf89ec92d214a4641bfcce90a5456a38b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a pattern of distributing links, likely for phishing or malware delivery. No scripts were extracted, but the overall structure points to a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://zaintik.org/files/galeria/files/mutofapupanikuwu.pdf In PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/jjji5563j9fl6c5igfd68ivf47/fesogegowikudavu.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/3f1930d69442be34c793e2f5792a7172/girerisixavelekoz.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160898cc1b7d51---navunorafedadudaf.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/vabovepurasi.pdfIn PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/divafadasiralugoke.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/43524880731.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a2bf07e5b4---88115060633.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/kefiwepekojibov.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/24591b9741edb056296243793a3f9cfe/29062294343.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872677275e8---96059724690.pdfPDF link annotation
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/fk58agsd9g472322tnfbtid4as/ranofitobazatalorurogoril.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/54303257075.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a8b3af4c9---33739040270.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/sedebemu.pdfIn PDF document text
    • http://fourfoods.com/images/files/kizinawad.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d200e7b61d---zibezikarivane.pdfIn PDF document text
    • http://74ahs.com/clients/2/2a/2a132ee8da0778863662fd4b1fa251ed/File/40592994065.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607043c2d888f---nodeselaxetozewu.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c669519fe81---43680211920.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/japowajad.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/14107231880.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/nozezusoromewedere.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/ti4bgv61q8sdn803dr7ojj4vq4/vopizu.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/duzizedixuwobusuviwodore.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=manual+chevrolet+spark+gt+2017PDF 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_off0000ca55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE267 19088 bytes
SHA-256: d1e7a76532c22a2cc1a4389ccb01cecece8b551d8376a2f122bb1e2e094c616f
font_02_sfnt_off00011425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11425 11156 bytes
SHA-256: 130c294e971c07c5cf4fad9bbb08001662c6b7dc207f4f4e00d67b7d63635856

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