Malicious PDF — malware analysis report

Static analysis result for SHA-256 070ff4aa31a20bcf…

MALICIOUS

PDF

74.9 KB Created: 2021-09-14 03:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3ce7447ae151e30a0b420dafba8681f7 SHA-1: 31af67cb9a69c03ddb1b7f8a54fa56b872bdc8b2 SHA-256: 070ff4aa31a20bcf1d78b6f1e8a9f323e2ad4ba5bc021e84a213265ac7de3a1a
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to exploit vulnerabilities or redirect users to malicious content. No specific family could be identified, but the techniques used are consistent with common PDF-based attack vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=tx3+max+price+in+bangladesh PDF link annotation
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/792eccbcd92bc4a74cf78ed2bd8d7bdc/watonede.pdfIn PDF document text
    • https://reaga.net/js/ckfinder/userfiles/files/xosivodopetaveruzomaje.pdfIn PDF document text
    • http://biomehl.com/images/content/files/3705487195.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331fd6adcf7---wuxawatevopafapikekijaz.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/13525405821.pdfIn PDF document text
    • https://ontogepszerviz.hu/editor_up/badowab.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/48298293374.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/90880169575.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161389dce99669---81087615208.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/26919330690.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/xoradizixugodadogefive.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/satanemofudorizozurow.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/midonigob.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/fefokujowosapibesuref.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/39077947798.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/zofekavapezepifefuxuwutu.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d02acbf64f---neziguxukavazajemananisap.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/fupakeza.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/98453691781.pdfIn 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
    • 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_off0000c0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F2 11120 bytes
SHA-256: 1ce3a3c8bfbcfb69df382d5e5b404f052cdac340762b5aeb4e3dabc73592ff90
font_01_sfnt_off0000da3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24F 17260 bytes
SHA-256: 0de48a0048fc5d41dccf6568a0cecd241f0850103066a2a39d9841c352ee7c2e