Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eac700c7ec282b8…

MALICIOUS

PDF

83.3 KB Created: 2021-09-09 19:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0200f963b67cffb0a3c00070dd66dc43 SHA-1: 1cf8bc08b3d16439c5b66d0dc4a7a8a1cf771f79 SHA-256: 3eac700c7ec282b8ddd11bba8a1e9d87c68bac5c56015f6e1420666a0b5ea359
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to compromised or disposable hosting sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://musicpark-live.com/userfiles/file/11242637975.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a14cea327---28250238686.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/35175076242.pdfIn PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/nazusoronilezitubodasape.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613913ba61dcb---pekebofimulij.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/tavujeruliwolive.pdfIn PDF document text
    • http://charivne.info/images/file/45493866446.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5c716d511---mexobadisekivawu.pdfIn PDF document text
    • https://superchills.com/userfiles/file/zaboremewomemobuzijibura.pdfIn PDF document text
    • http://www.saletime.gr/admin/fckfiles/file/81645771270.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/dovowitetimugesuwetis.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/batibimuwowegi.pdfIn PDF document text
    • http://machulski.com/public/file/27479403069.pdfIn PDF document text
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/kofaxusipomitazoda.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/liriwofitalebedakelasovo.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/6057965c8103cdfdb9f6738d54e00520/72543735506.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210905_121014.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/33822899751.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/mekolibiraganujoxuv.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2d0a9b6f8---76557258407.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/fuwuvogaxufofodolepubiru.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/161351c76618c0---61520072605.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/e9f82a596b337f46eac24a062aff965d/38550137550.pdfIn PDF document text
    • http://contelex.it/userfiles/files/1601452217.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=grey%27s+anatomy+gomoviesPDF 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_off0000e284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE284 10660 bytes
SHA-256: ac48ede51d4b7619ccb995818ee790cfbf7cb23524068706c18af5e42786024f
font_01_sfnt_off0000fb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB13 17140 bytes
SHA-256: ea0d4f43258c7f5fc2a64699676d554dc8909c264a47a9cc79376b7257a23fe9
font_02_sfnt_off000127a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1