Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a8d14b7417c8a55…

MALICIOUS

PDF

75.4 KB Created: 2021-06-06 07:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e1b7563cd61c2e62a4668d0cabbd5091 SHA-1: a045ea0da0e9f47e9c6a8ce64961b35815672485 SHA-256: 0a8d14b7417c8a55fe598c0d8341efdd5cf9c32ee25858704bf6f6eee5915a9d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and compromised CMS upload links strongly suggests a phishing or malware delivery scheme.

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://wastran.ru/uplcv?utm_term=apba+football+card+generator PDF link annotation
    • https://pima-alarms.rs/slicice/file/dagewovafopadatutidi.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/5cd5ca9b259d078de62fcb333aba0912/jenikelig.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/butegasoji.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/norenanuridawizoxufan.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/92974796314.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/tm3k2k0rfcodlb9lsmvsjaeu87/83099188919.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/68586878071.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093cf0aa53d4---zonazexomujuku.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/9ggcjveobmdps2mcc8bgjf7rs4/kepaxe.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/979754c9f5d763e38b5f5a1df42f19ed/39239245739.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca8d092cfe---24184890992.pdfIn PDF document text
    • http://waukeganeast1980.com/clients/877304/File/ruxafarutinofutuvul.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/faknmgn6dgabas69cpv0ch5cg0/damezanidunutezez.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/2qbaq7lia665nqt68jfnnuhlog/15114937981.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608722c04e738---kajedenabaxuna.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/7234414133.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b779bc0791c---15110438688.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a2b3dcb76---78116461733.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/cff037f7f3a96fb6d0e0b1b234c805a6/27400760493.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/65c202215d91c2a0234399fbd65a93a1/61238093166.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000d619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD619 5272 bytes
SHA-256: 13c65f92f2cc166dead528aab3ea555e0d612252ebca18347bee5a6745b67bcf
font_01_sfnt_off0000e817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE817 10124 bytes
SHA-256: 0e7bf168341fad7bc20aa84170344bd856e7a6777df3d427b65c815273cf7dfa
font_02_sfnt_off00010aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEA 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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