Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0a39572e9ae8c6…

MALICIOUS

PDF

83.6 KB Created: 2021-08-13 09:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3a935eb5ffa021ab9e3a389e0c81d304 SHA-1: 45d31af9438f0a3d04f1f8ce88167f756f09f37c SHA-256: da0a39572e9ae8c668b89dc3f6a4380697982a07b3496b7cee460bc87f1cad59
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm with numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and link farm indicators points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://shoppingplanet.ro/ckfinder/userfiles/files/jetukivewuju.pdf In PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832966c7948---tudolugug.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb39b9d79e2---55842456296.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/438851e1be37eaf4a0b8aa2e3a7ac3fc/puwumelukapopeb.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/zadubusisefoju.pdfIn PDF document text
    • http://nktrading.qa/file/files/gubudumawibomedavet.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/38442112103.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/ralawexanexup.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/25910388424.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611180a6a0419---51255863302.pdfIn PDF document text
    • http://staropolski.net/Upload/file/96643328525.pdfIn PDF document text
    • http://trevelci.ru/ckfinder/userfiles/files/ditevakaf.pdfIn PDF document text
    • http://0851gay.org/userfiles/202107file/2021072923263770554.pdfIn PDF document text
    • https://ebooksweb.net/files/file/46941377884.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/50422329334.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/bawek.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/99685829d33dbf368b2093899f88ddb0/vemenepar.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/884f00bb9d621992eeadd1ebd408021a/210695534.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be3752b8c91---69910586071.pdfIn PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/79885123245.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6b0a7c14d---dazifovosifavifovokunodit.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f260ce60a---13579239718.pdfIn PDF document text
    • http://taiyoaquris.cn/upload/userfiles/files/20210619030740.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/147bc8b358d03bbbd5c0c9f6e9189760/12078250743.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+do+i+restore+my+camera+icon+on+my+iphonePDF link annotation
    • https://forums.androidcentral.com/showthread.php?t=661292&s=5a3892bd643a96f09f6114564a92f5f0In 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
    • https://forums.androidcentral.com/showthread.php?t=661292&s=5a3892bd643a96f09f6114564a92f5f0In 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_off0000e26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26B 17088 bytes
SHA-256: 4092a4229a8a2ec0879b0241ab445243add107f8d0455c6e86e3054b42167264
font_01_sfnt_off00010f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001274d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274D 10924 bytes
SHA-256: 47a76ff35111d601a9476626e2984dc5f76d9055eab0270834db66f0804b1df1