Malicious PDF — malware analysis report

Static analysis result for SHA-256 569b525347f734ea…

MALICIOUS

PDF

72.5 KB Created: 2021-10-02 20:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 4ab533f4142fa0ef2fb120800fb7d619 SHA-1: a5c1592476e35f0c1ed2040fbc8e86363130797f SHA-256: 569b525347f734ea2714e50a48edd6e1593400f5bdafd4217115c9860090c0f0
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 phishing or malware distribution intent. It contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. These links are likely used to redirect users to malicious sites for credential theft or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://infrive.ru/uplcv?utm_term=after+ever+happy+pages PDF link annotation
    • http://annabarons.lv/files/files/derokurif.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-19/20210919163204366929.pdfIn PDF document text
    • https://jungleflightchiangmai.jungle-flight.com/Uploads/files/43399545085.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4eef9f191---timiguwitowabifis.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/4m6tdi6tfsdq0948usb7vle2h9/duberiwumekemametadebos.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/degujinibezimuwojaxigobat.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/51087141174.pdfIn PDF document text
    • http://bscartridge.com/pic/fuxubemujunijodabufibofof.pdfIn PDF document text
    • https://vanha.kokkolansuunnistajat.fi/ckfinder/userfiles/files/zesajebidi.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/sumulovitapivosav.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/76470040418.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/39910402804.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/powulewediki.pdfIn PDF document text
    • https://thebookonpersonaltransformation.com/FCKeditor/file/6016868690.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/43645416825.pdfIn PDF document text
    • https://unchiulmihai.ro/files/fckeditor/file/74971850762.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/fisumunodozovaxe.pdfIn PDF document text
    • https://ctapigroup3.com/contents/files/32247209492.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210918041744_897xuh.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/binavaxorobo.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/sivazuzi.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/fobixebapirike.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/woxagusumunaz.pdfIn PDF document text
    • https://campfun.myhost888.com/upload/ckeditor/files/gowefuxoz.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/posoboxoxufafune.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cb58fe7974---7240084173.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/80209113367.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_off0000b8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D6 17416 bytes
SHA-256: cc2527373bd4c68431e478d44e9a69a5af6a5b04b6cf7f78daff057e613b712f
font_02_sfnt_off0000fc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC04 10436 bytes
SHA-256: f878ee9a7d7da0f7af831c32e84630d5755ea3b266d9c7d6136c52918fedb308

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