Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd444154b40d0ca…

MALICIOUS

PDF

81.2 KB Created: 2021-09-01 09:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 864053c6432bc36be067b65e8bc91da5 SHA-1: ce5c96e6752840fc119af8d5e2264a8a8b0e2c18 SHA-256: acd444154b40d0ca31794f0f7a90787aa79a41f262dc11e7d1a4450631fdc3c1
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/e04539d1bc20b8779f577c240d13cb2f/tovudunagelenol.pdf In PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e6de02e46---fumuxobidutukube.pdfIn PDF document text
    • http://kerekagy.hu/UserFiles//file/tokejewemejofinusimozubi.pdfIn PDF document text
    • https://mytopics.it/uploads/file/fuwivonafakivazupasitosug.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/11552466863.pdfIn PDF document text
    • http://evrokomplekt.ru/userfiles/file/bulesemakepetarifeve.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c88a39079b---63193294575.pdfIn PDF document text
    • http://condosworld.com/abisol1/userfiles/files/57278123232.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/58202259281.pdfIn PDF document text
    • http://laboratoriologos.it/userfiles/files/12318587966.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ed18eea9a---14794552218.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86d58b55b1---rufozesogesebilepej.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/xafegadi.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/42499322958.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/906a0525cd8ccfe1945ba117d7b018bc/jamodetepepawekiso.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/d2d556e7b6705997a8333410ee3269b4/womobabiwapu.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/60902764329.pdfIn PDF document text
    • http://korsorlampang.net/user_img/files/bajesosibawerofunexab.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/f792c7c5a8b1ef4122afa26015eaf868/mokigikisalilosubekolidub.pdfIn PDF document text
    • http://nenkin-t.com/upload_img/ck/files/4565901198.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/73517513757.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210726011421.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/162e6d278080f05120d240b4b66b50ee/95485898322.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=puss+in+boots+apk+downloadPDF 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_off0000d82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82B 10572 bytes
SHA-256: 5a6a1855fea8c7c3696c3fcd1498805830ec6e31f1a13111db3638b92ff082bd
font_01_sfnt_off0000f038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF038 17828 bytes
SHA-256: d7a06bb4fd01b1d94594b90974d580bf9a13ca1baa3e8c81110fbab6e0ee66f3
font_02_sfnt_off00011e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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