Malicious PDF — malware analysis report

Static analysis result for SHA-256 6032b7e787a626e3…

MALICIOUS

PDF

70.2 KB Created: 2021-09-28 22:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9cc5df5c2bacef37fd8d0e8ddcf85e7f SHA-1: e6a7fd03c29146c7b925dc5926fce9ac71a096be SHA-256: 6032b7e787a626e36fafcea32b863f9c45594918da652b0e9992fd001f29d4ba
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics points to the document's function as a lure to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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=how+do+i+find+javascript+on+my+phone PDF link annotation
    • http://www.southpointinstitutehowrah.com/admin/uploads/file/sogugisekiwekilodax.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/96696535915.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132efad544c8---muwekoragenarinupikalig.pdfIn PDF document text
    • https://demoepaper.104portal.com/upload/serback/files/20210923010323.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/0290nqn3p9apou4e2cra0ra931/91787439888.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/lopogilolopa.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/rabupidamojudovil.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/xadekajapasabi.pdfIn PDF document text
    • http://szabobuszberles.hu/files/files/gesepugutetefiwu.pdfIn PDF document text
    • https://www.lsv-wittlage.de/ckfinder/userfiles/files/35185828074.pdfIn PDF document text
    • https://x-software.cz/data/file/tibojizavarafijevi.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/siduxovepipederanuli.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/delozejerimaxu.pdfIn PDF document text
    • http://nktrading.qa/file/files/fadereduta.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/difekalujuviwosifiniv.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/89241390569.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/43278632635.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/76cf0c32d6bc44961365830dac7463d1/lexofijubusedozepiz.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/20886bc2360cbc037c3711b195a45b8a/43148329727.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/16581747394.pdfIn PDF document text
    • https://bursaphotofest.org/uploads/files/wuzepawuxul.pdfIn PDF document text
    • http://tfforming.ru/d/files/govaku.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/54515987418.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_off0000af7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF7A 11224 bytes
SHA-256: f15d113efb479efb01e64123106c25fa5baec48df3df76a4da3acd0673070f69
font_01_sfnt_off0000c99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99E 16456 bytes
SHA-256: 25553792e99c219826610e7ad985034e0296569decc8e58dfcc812c4b2c5cdd9
font_02_sfnt_off0000f328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF328 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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