Malicious PDF — malware analysis report

Static analysis result for SHA-256 970e97a3ce9797c0…

MALICIOUS

PDF

86.7 KB Created: 2021-06-20 21:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4efa39cef51cee0129646477bf6c49a8 SHA-1: 78e681fb4e84edc7f906b34f919e7d0d9a46482e SHA-256: 970e97a3ce9797c03bb22b0a6d1c8838cd72ea6de2878de7b09719aaa105cb5a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to numerous URLs hosted on compromised WordPress sites or disposable domains. The document body, though heavily obfuscated, suggests a lure related to 'Bangladesh math olympiad books pdf', likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://amatnieks.lv/pictures/image/97417155303.pdf In PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/cabb953623cbdfa01b57c332e6b2801c/fuwatukirem.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071634d0604c---busakowubamasamusesa.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/28b7f85b16cb7e0b35b1adaa5c435b63/76905753251.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f18299f8d---jeposuvujefinofufilukidi.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755b82821ea---88751804486.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c387266bc---83075914471.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/38771fc33775846b3066b682d4b8fa22/98113066483.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/jc4a15qo93ds39kkucej6sbn67/netikadogutejoz.pdfIn PDF document text
    • http://ilksolar.com/Images/Media/files/83449900979.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160986a7a0f022---81029913307.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/7be003b1855ebfaa77fec4a70694a990/23133774135.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/c8ba73e04b2192b1023d1228a1dc2ff5/45526111966.pdfIn PDF document text
    • http://altinay-law.com/images/file/pipifemuvasa.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160abae11de67f---42859715387.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/nuvaduvexojupivawizekogo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=bangladesh+math+olympiad+books+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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F9 5716 bytes
SHA-256: 33ee50eea94d467ae1075bce234c576be24352bf1d6444a8e9efcaeab857ef1f
font_01_sfnt_off00010854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10854 10040 bytes
SHA-256: f92e5d82a2befdca8b5a4f69acf00a49f52a2c00ffd452579c247a72d9604b7d
font_02_sfnt_off00012804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12804 11272 bytes
SHA-256: d731305c08fc9966e88bed2fa7454994196d07b9e0c5f32b13c60ef3825ec9cc

Open this report in the interactive analyzer, or submit your own file for analysis.