Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2efe2d5dbf5ad6c…

MALICIOUS

PDF

90.8 KB Created: 2021-06-26 01:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1f4da2d901f785f361e946151e851972 SHA-1: 0cb18ab5fbe1e6ce79d9087639fa71012ebaee44 SHA-256: a2efe2d5dbf5ad6ccf6b7eae4a9e3549a8cc3d26a23fda1f1e01702cb282c014
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF that leverages compromised websites to host malicious files, indicated by multiple heuristics flagging link farms and compromised CMS uploads. The presence of a 'download button' lure and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with attempts to deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c8843e70e4e---pevonagodufate.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/9652e353ad6508eef25cddcc706dfe3f/powovazobil.pdf
    • http://bualuang101.com/backoffice/upload/files/79799334429.pdf
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/lr0np4vs48q56055f9bit6ncdl/felubaw.pdf
    • https://chetanaus.org/bheru/uploadfiles/file/83591399791.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0835ed7e6---sesutexa.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aeeced92be---sirufaserixukawiro.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/9400142ac70e4930dc6405f8e411b218/tapewabususedapewito.pdf
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/d91d5fdc1bef362ac37009394bcd1a18/dafulomefuked.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160930c9a2f3b2---40293250500.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a82325274---54335434520.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7884adec1---satewizesewi.pdf
    • https://securitydm.com/slicice/file/jezutozez.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7f434cbc2---befekatojufefenedi.pdf
    • http://gourmethousemacau.com/UploadFilesfile///puviloziwilabomazusana.pdf
    • https://tortugafilms.ca/adminfiles/file/loxedijasowuxinifodosenol.pdf
    • http://prplus4u.com/ckupload/files/66603071271.pdf
    • https://edu-mate.kr/_UploadFile/Images/file/salefovutupezakelopu.pdf
    • http://activesolutionelectric.com/images/file/kejuketakurakofes.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080b5c66aacd---53487329530.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f916706f5---5981549996.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/3c65a8addd06f541b1633f275eb7f79d/vonevoweletibub.pdf
    • http://chiengthai.com/file_media/file_image/file/27927556216.pdf
    • http://alexhofford.com/temp/files/file/gepapetanakumajatakor.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6f15c6f06---wugorisezimekigo.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f2b8f18cf---jegigetogasuve.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/mr76fik0gjohgfp0adlgi8a6j6/8401342114.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=pro+evolution+soccer+2013+free+download+pc+game+full+version
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcb8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB8 16792 bytes
font_01_sfnt_off000114cf.bin
210f2b00ef6866b47e7fc35c4ab9a5436c7db26ed4af4ebba100a9d5d02fbcd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114CF 11680 bytes
font_02_sfnt_off00013099.bin
e3ea54f3ca7641a782e586c606f12a254f6bd23d0c17b7fe17503583dceb4549		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13099 17092 bytes

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