Malicious PDF — malware analysis report

Static analysis result for SHA-256 2625dc09ef3499f1…

MALICIOUS

PDF

110.5 KB Created: 2021-07-13 19:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0a2e2e74c175b58488ae5ba2e752958f SHA-1: fcbc9cbc520a0e6d0949eb919b3fc450ff459c12 SHA-256: 2625dc09ef3499f1ac87776b8a44c6f34463ddd920304275f228fac997448f4f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of embedded URLs, many of which point to compromised WordPress sites, suggesting it's designed to lead users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further indicates a link farm structure on disposable hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://altinay-law.com/images/file/84623133580.pdf In PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5b82c52ab---lagagivirebidudanexen.pdfIn PDF document text
    • https://bushregenerators.com/userfiles/files/59212960823.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb875c0df7---26553220551.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/469241119ed1c038f982c1b399694a6f/36714659214.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/l6n1k6pa36aalfdq0i8coqrsd5/zozuzadekotegogazapolobix.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/242fe35nm6sfvks478kqtlqp55/31953398200.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/as43pmn2kmucj54i01r3v6vm7o/tapilenigijeviwelilefo.pdfIn PDF document text
    • http://smartraoptics.com/fck_filemanager_upload/file/95080775170.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/kefele.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210527_945DDFB6B9F2CFB7.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/7c3bd95707e13fe43321a4f1a003cc2a/fesugitas.pdfIn PDF document text
    • http://m2m2design.com/userfiles/xevawuda.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/ei5dq3jiomb9b8ro71u8c4mcq5/jebukotiv.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607442c293cdb---38636198145.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/lotezimexotadi.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7687e405a---38237501532.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16087df51d5f31---89397868498.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/sefibujotesisiborozixuru.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/sgelfupu09mou9madha8egrmdo/53725718483.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/64390056478.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/5c1507986eb23df04c695e7c46327740/39914286294.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=geothermal+energy+lecture+notes+pdfPDF 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_off00014654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14654 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E66 20300 bytes
SHA-256: a9bf579d9015a628d1f30fba771d5448a4b3130a0b16791cebaa7eb97ca67698
font_02_sfnt_off0001929f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1929F 11228 bytes
SHA-256: 413725aab82d17e46e4b7f7414049a8faace8f6c3335147b805dedb8c8beb8a4

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