Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9eb109ecfcfb833…

MALICIOUS

PDF

100.8 KB Created: 2021-06-25 17:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e95de53e53b47ca45f3c68f6ec6c0620 SHA-1: 344f01813cd1283dab2a7a1183b7a250e444a3f7 SHA-256: e9eb109ecfcfb8336a65f1cc6872436f1ec6ee2dbf44f3623724b79f9a827578
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to further malicious content or phishing pages, aiming to trick users into downloading or interacting with harmful payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f117f19244---65648676886.pdf In PDF document text
    • https://777mto.org/contents//files/ladarofomeziketopupu.pdfIn PDF document text
    • http://kelvista.lt/images/files/69428436454.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/258i4hpti0fsprj888orodtl73/xilewevaba.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756409db6a1---52824097342.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/7de8f2d5dca02d72ba4f4d025d010b72/93766733391.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/wajezexo.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/26680192002.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16086c37182a89---penotenax.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/9e03cb5f0e2e8f7ac92eb6d72696ca7a/23852990200.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/73748cb12da141012ed22e0bca8c5e59/dubadazabugana.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/1b4ffa795b586e56c825de6a85a8b459/vovuzojijotamaxax.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1608b54897e842---79754826643.pdfIn PDF document text
    • https://promise-land.com/upload/file/nelalabojoduwavimogatamed.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/0815d6f900017b15c8ddb942c6ae6a65/gupep.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021061805121773499.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/dulutabolaxobupapagipani.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fd045d5de---96388206002.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb61bbcc891---puvax.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877a3469cd7---11168794138.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe639b5c17---48286105744.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ae96031a8---wexitovineliwividakuweli.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16076bb8c0a65d---2927143789.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=feast+of+baptismPDF 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_off00012848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12848 10384 bytes
SHA-256: 94b040e94880b0915848df947c082f24a78bfffa0a82a6b3fce278993261e8d3
font_01_sfnt_off00013f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000157ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157AB 18236 bytes
SHA-256: 86c22251edf1fa24819eb785800623f15c367b41f0759535761dc0a15ecc31a2

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