Malicious PDF — malware analysis report

Static analysis result for SHA-256 7069c888b2b2160a…

MALICIOUS

PDF

73.2 KB Created: 2021-09-28 11:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: c4f53984ad461f1da8442657622f7ef5 SHA-1: 576e5a414cb4cd2c7d167be71e9527e98ba6316c SHA-256: 7069c888b2b2160a92777e61710d86e4835352f8db14a4f2a56b616d9308f22c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm or redirection scheme. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were directly extracted, the structure and URL patterns suggest an attempt to direct users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • 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://nationalcoopadvisors.com/userfiles/files/29402515441.pdf In PDF document text
    • https://incoyun.com/calisma2/files/uploads/luxomavajirime.pdfIn PDF document text
    • http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/ruxituwuvizonupi.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/nekugesesanuxurudutalexim.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/o1gk565slo3q44816ct4729tqq/19680579693.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/takifunulubopigudula.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/9498449233.pdfIn PDF document text
    • https://netkat.in/ckfinder/userfiles/files/lijepekafuxenisigosob.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents/files/94446275686.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136bcd793207---19774824135.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/rapupesu.pdfIn PDF document text
    • http://neogmbh.de/www/sites/default/files/userfiles/file/84023548247.pdfIn PDF document text
    • http://ministryofrum.com/memlogos/file/16246873140.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/161508acc87ec1---5047179900.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/kobevalutimesovavavav.pdfIn PDF document text
    • http://hengtongblower.com/d/files/92427776211.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/xubizegaxevoxojo.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/79117813257.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/69601104406.pdfIn PDF document text
    • http://thibidi.vinadesign.info/uploads/images/files/42695535501.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/67988a4c2e29fd585e2102a2b916e8a5/61214555545.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=android+apps+installed+without+permissionPDF 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_off0000b6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6D4 10824 bytes
SHA-256: 753db3b3bb0fdb5ef8dfea4d096cb202ef98aecbf74f49cb310e4b4c7b9b571b
font_01_sfnt_off0000cfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA5 18384 bytes
SHA-256: d622262eb1f33f4434512898360fbcfa1147538548075b4569c252a17c9b1a63
font_02_sfnt_off0000fed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1