Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e69f38b4dc6548e…

MALICIOUS

PDF

86.4 KB Created: 2021-07-15 14:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 27edd3721366d497fd606b2073b35216 SHA-1: d5899cdeccdb00c6ffbe6541f844221dbb0be386 SHA-256: 8e69f38b4dc6548eb502411c423594db01083d69fac14d6884ca38ae8355a957
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/1cd9380d6993365f9c84c10c5554035b/9645271399.pdf In PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160797f5873e45---91690063013.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085a53213ad7---8464561192.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/45849710395.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/e4ac3e6ae45673f7442c0f1c36dcdf07/lorenogujo.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/33153747a8ab8713650a36d4a3cf532f/90851757061.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/4a8171b8b995db94489481006c1f5f57/9082476335.pdfIn PDF document text
    • http://nessium.net/userfiles/file/45730632709.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210612005519_2jygyy.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c80977d82f---movogojir.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/e8841b34bfac2917648bf1b17df8bea4/wetuvikikub.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/widebagevogotonoxaxabuw.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ece1c889e---xinewinuvom.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608612be3bbd4---wovaditevosolulewel.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/33288617453.pdfIn PDF document text
    • http://hkalc.com/userfiles/wapujak.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/ggosjmva5mebijjvn45saquc7u/wofuvokafemodirasu.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/5qt5u3emag6sgc2fkhol64ps88/xebagabewufovutineg.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e7128d0dead---49024358405.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090e01beb0a0---27966433224.pdfIn PDF document text
    • https://invest.pl/userfiles/file/fedimek.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/40041e603ff5b13bbff6da0b800d7c8f/tovagawufazoxalazis.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/pixokudefetolufezagaxeke.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/bemawilobexapawumesalanof.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/zabebu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=sex+with+a+dressPDF 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_off0000f0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FD 17224 bytes
SHA-256: b0cbb98390576d3d62007d769d7591b94580482aae0128f13f2172e174c155d1
font_02_sfnt_off0001352b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1352B 10336 bytes
SHA-256: 210fe686d73b3c6bda6c8dbb9cbde4fdce4592d11020cdc91e2285a28205ea00