Malicious PDF — malware analysis report

Static analysis result for SHA-256 070f86eeeb0a2fa3…

MALICIOUS

PDF

86.9 KB Created: 2021-07-13 16:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6ef0b5241dce0b1dcd6b51f70e0e5f8a SHA-1: 9f2e4c6c6cdfdd1e3e6f748d1fc023efcef219ce SHA-256: 070f86eeeb0a2fa34ed622482352e42674ffc19009c8b4f7a636606b92ece04c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites acting as a link farm. The primary purpose appears to be redirecting users through these compromised sites, likely to deliver further malicious content or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/7d7277a8a1365ecaf407a610fd970f9e/98689327608.pdf In PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074cd60919f6---94499376403.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/016c2596710a3c9544613e96070f7a1b/16928071100.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/8aad45e204491afde02f942f9581b721/49168482987.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/pqnvbnn239cp9q4g6k2vfmgtdk/wozelilagurumatej.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/wixokobukatovugijewaka.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f483b20bdd---19756476046.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/gn7550n5b254vnn5fmc8o77gdl/vixikuxanage.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2dfe43fe5---57559157910.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/dfeb229664c916faa8f3dff1c2a07abe/koderuropofokoj.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/jedejatopeko.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/28473833733.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/dutudokazisir.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160db5604d00af---39359224006.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/fudewoj.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/e2de6f7685bb7a264b698fff3c09bbd6/38712295783.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f649513e5---didujuwatowiropigenox.pdfIn PDF document text
    • http://baudoinfamily.com/clients/f/fc/fc66627f90e8a365851b026dcf169025/File/joxiwadetaginarilo.pdfIn PDF document text
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/dupurosurumelizes.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/2c78608daff73e9b5e493ecc1fcf75f4/8805298631.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/detamosanopivijifi.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/raser.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/5pda2c0ae6r1h5vgd0mbld4p9j/93359624617.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=undetected+warzone+cheatsPDF 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_off0000efd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD3 10480 bytes
SHA-256: eb34ac960159f50fa360a9aaa7a4bf444e58f35d93bf53dfcffcd78fe3aae775
font_01_sfnt_off000107b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC4 17392 bytes
SHA-256: f88503eff9f6ca43eee05630809b919ec354c2ddf258f5fc02e729bcdaa0bfa6