Malicious PDF — malware analysis report

Static analysis result for SHA-256 996e2ecc074d775f…

MALICIOUS

PDF

77.9 KB Created: 2021-07-03 21:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: aa1cd821f357ed1e56f285d12baa2a09 SHA-1: 92de22a0137b1cf796639e56699a61cbab4b6405 SHA-256: 996e2ecc074d775f99455b3d636037ef8bd3e98268188d3ab7fe61f8bf6055cb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to websites hosted on compromised WordPress installations, indicating a link farm designed to redirect users. The ML classifier strongly suggests malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the nature of the links and the heuristic firings point towards a malicious document delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://crysiq.ru/uplcv?utm_term=ese+2020+solutions PDF link annotation
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/vqaq5v39efst0f1i8spvk8ltbj/83463568103.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/a688d55fa96bb1070ad4f3bae5bd0004/reselifesulejejeb.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082947805ef8---37064639255.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/83m4utrl7a2mnk2n3mduf8qunp/94769150854.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160ac48b496920---vixudejipoluxopunes.pdfIn PDF document text
    • http://4yoga.by/pics/files/14833352808.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/a6jn94psv3no1d333kd7rpu86t/sevajaz.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/difagiwe.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/gerewo.pdfIn PDF document text
    • https://unosms.us/userfiles/file/83737982634.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/rubekopon.pdfIn PDF document text
    • https://btegypt.comfile/96955792557.pdfIn PDF document text
    • http://artospace.com/pics/file/68863950504.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2a9273a064d10a72fd9b3e727c478da8/36735373954.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/c5824f3365e55a5d1ff2429cbe08f665/mowafinowadatekaf.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c7107c2ec---3966969445.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/zibek.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/44763111347.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/cb4ed0db2ac2f7b683af055f6837a895/jukemonisutetu.pdfIn PDF document text
    • https://harryfok.com/ckfinder/userfiles/files/73187823110.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/9l8k83m5butqeak6fh4bgtj9m6/jumixebitexun.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/f090d36ca3f6712ddfb28f198b5c782b/wibofe.pdfIn PDF document text
    • http://puppies-4u.com/clients/e/e7/e7f09595da74c05d2059c741134300d2/File/feviguvak.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/28025657834.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_off0000c971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC971 10164 bytes
SHA-256: b574496f64ccffd6df8879f4d95ecb988eff3b5f410b2fe53377a8eecc393e21
font_01_sfnt_off0000e057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE057 19432 bytes
SHA-256: 9022ea25efc59133258bcac82da90d7dfa04fd04067728f49da010d2156684b6
font_02_sfnt_off00011256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11256 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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