Malicious PDF — malware analysis report

Static analysis result for SHA-256 e409468d5a188bbe…

MALICIOUS

PDF

82.9 KB Created: 2021-09-13 23:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 950df25465cee61d1157ce99d36cd742 SHA-1: 29ecbe8acfd3ce6fc2faf33b5eb417820307430e SHA-256: e409468d5a188bbe60fa23a1695a5cad5f406f1b2779ca1dc825b1700bbed78f
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://ronaldtan.nl/images/photo/55896567369.pdf In PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/74263458661.pdfIn PDF document text
    • http://itcbeautytrainingschool.com/userfiles/file/35277284819.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/3d0bf4df5b6efc6c7d54d365c070e8c3/satunaluv.pdfIn PDF document text
    • http://lovesenergy.nl/file/94368740936.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/88737898276.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139159bcf8b0---72755206395.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/ligotusugalabapet.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/1g5hicj0nspln1dslra834sbcf/51500701831.pdfIn PDF document text
    • http://zzps.pl/userfiles/file/dijixatufomus.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc692bc1e3---kopemutubusarulonirepuni.pdfIn PDF document text
    • http://thienanglass.vn/upload/files/nobijategezowiwi.pdfIn PDF document text
    • http://interstudy.net/userfiles/file/29329769597.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/33730451423.pdfIn PDF document text
    • https://abisspaandboutique.com/nbloom/fckuploads/file/xelidafujugimal.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/83547945520.pdfIn PDF document text
    • http://peoplefineart.com/assets/202109/files/20210912201026773319.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/4c56de13b74af736a4cd21c8862fda8e/sagidajanuxe.pdfIn PDF document text
    • https://cupanghitam.com/contents/files/fetobabadevisazekujujop.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8a7da0087---45805772177.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/18485225046.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/vevuxugasogufajowup.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media/likafamitobuzi.pdfIn PDF document text
    • https://migger.dk/userimages/file/soluwibixapebe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=stick+cricket+premier+league+unlimited+money+downloadPDF 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_off0000dc70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC70 11156 bytes
SHA-256: abd1f994f20c0434aba3a1c007270e32e94b163f38b4b61e8ff736dd9bb0bbab
font_01_sfnt_off0000f65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65C 18048 bytes
SHA-256: cb3ee640c187d4618ce7e12bff735e679f206674bfb3217947cb9677f5aa7cc5
font_02_sfnt_off00012532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12532 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1