Malicious PDF — malware analysis report

Static analysis result for SHA-256 2382345b2ea59294…

MALICIOUS

PDF

85.6 KB Created: 2021-07-02 17:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a620a64a1415b285f5f1e677ca4a7324 SHA-1: a7f849dbad3431192ff5efb8d03b199efdb5b8e4 SHA-256: 2382345b2ea592948fe790872599fcda483cdb2a6c4ffa4dd9659f581052ceb1
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious content or phishing sites through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://budaikepkeret.hu/uploads/file/42777064193.pdf In PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/loxatesixunubar.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/v9q4t6i0noiago37dpk995rrng/78110565486.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/65762855101.pdfIn PDF document text
    • http://talleresjpg.es/img/file/36164803876.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ee93ghhql1s82dmcrarg5b2ec4/wemadadexafamuzasit.pdfIn PDF document text
    • https://tcremich.lu/files/files/16900436304.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/06/files/210602014925.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/bipanimumetopofetijala.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebd8ba7235---90903650906.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/10618862960.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160cb212f617cb---gilijuzegapaletesigagugaj.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/34172284570.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/6gkjv4cbl7jm9dduurvdbt3gbu/52521558418.pdfIn PDF document text
    • http://christopherdallo.com/file/zakapopuvovulo.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/ld3a320bmki1ts1b542d11o70h/16537314734.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/65d835db2e2a7025d4517fd20bab4919/80647933111.pdfIn PDF document text
    • https://noblacklist.pro/web/img/podborky/files/lugibiwadutiro.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/16914007466.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3d038fefd---vigibunuxoxuvu.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/8ugvg0p115afc0s8bsq73slke3/61379988337.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ab1f16f3c---59988928674.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608952f341c5a---kolutoz.pdfIn PDF document text
    • https://masihpt1.com/contents//files/tolifuweluw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=cute+things+to+tell+my+girlfriendPDF 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_off0000ea98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA98 17400 bytes
SHA-256: ff603831e833a1d526ce76b9b048c33ed0a61bcbf43adcd82fa965be0e17a887
font_01_sfnt_off0001181d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181D 10884 bytes
SHA-256: fdb3bc99bb0fb9001d8a87cc36fa3d7550e3f52888e37fbdc81da1588f63860e
font_02_sfnt_off000130ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1