Malicious PDF — malware analysis report

Static analysis result for SHA-256 4616f7a9f0ceb8ed…

MALICIOUS

PDF

93.5 KB Created: 2021-08-12 04:23:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 515c8e113070f50bafbdf8b31bc17fb3 SHA-1: 5d2fbe52233e77afa4117b8a7a163a78c6ab7553 SHA-256: 4616f7a9f0ceb8edb8cd9934410f1b1061fc3a6eaed0f42e742d93a518474d1c
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute further malicious content or phish for information. The `utm_term` parameter in one URL indicates a potential lure related to game modifications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://inwebjor.ru/uplcv?utm_term=into+the+dead+mod+apk+unlimited+ammo+and+money+all+unlocked PDF link annotation
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ppqmub5n5cldraopfargq920l1/wutejiz.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/qrrk320fk0us0dgq055rc088eo/42225396788.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104942fbb055.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210624155058386.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/beguzelavexoz.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1d2a91134---guwekusuzolab.pdfIn PDF document text
    • http://hz-kontejnery.cz/ckfinder/userfiles/files/49615587027.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/32818708823.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b485db7698c---jemubixorujoka.pdfIn PDF document text
    • http://teraval.cz/res/file/65436584640.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/d8917599ca751aea476ab0471c1a3def/69735280331.pdfIn PDF document text
    • https://datajournonepal.org/files/ruveriragezunelinad.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/35362836553.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/lijiwepapizujodafiraxuvel.pdfIn PDF document text
    • http://jar-ted.pl/file/gumopetorugukeduterom.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/zujiw.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/sunejimejufuta.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/1e43009c00b4846784b89d1c4d106aaa/pifivisi.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/53e2d8414eadb96261f2de4b7e1bcea5/bedesutilibako.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/01serbp2n5cs0ak0dscetde16c/movuvenijerutesof.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/vufesezelojanido.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16082d1c25cc92---43232149970.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a825a72c29d---88632459258.pdfIn PDF document text
    • 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_off0000fcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000114ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CA 10768 bytes
SHA-256: 6e9cd069b0da875143f85e22d41131061906800f9b1135aba7e6efab0aca03df
font_02_sfnt_off00012d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D59 28736 bytes
SHA-256: 62d410041dcc080b88b1b658dd8ad00de2f9ce47e188a5edcecec34eebff2ff0

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