Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10bb13f65a4fb44…

MALICIOUS

PDF

76.7 KB Created: 2021-05-27 22:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ff8b79174cbc68583236e504c6cd888 SHA-1: 1c12ddbc97cfd38825f5038479d101f5dea3981f SHA-256: c10bb13f65a4fb446e111d9fa8c283b9c5b2bdcf1d813cdd18cadd0e80a07482
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body and extracted URLs suggest a phishing lure related to a "Neteller money adder 2018 apk", with links pointing to compromised WordPress sites hosting further PDF payloads. The presence of external URI links and the nature of the content strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://philabc.ru/uplcv?utm_term=neteller+money+adder+2018+apk
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608283c193bd5---94532834347.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/d2evai5squ770j5puoa2nq8ni4/67057475687.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/185b7f058690ccba361e648fb17fce1c/bululikesuxesizinid.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/670afc4dcbd81769a1d005e6e3a7237e/lusofo.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/8c79ee42196b58b0052d02d4a24743f4/paleditomobafomivamaluxi.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/407f8701c0b0934419d2b95faacb1daf/62391140289.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a206fec129---74717395466.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983ff415f19---medaroku.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/aa8f3e381cc3f75e9ba54b56ce82b24e/19113038975.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/3d9b5d4a9eb36ff7da3fccdc90f0cdbe/23355634794.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2cf717b0f---loteraz.pdf
    • https://asset-books.com/userfiles/file/62860584393.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16093047d9b51c---vamazelakenuxanivas.pdf
    • https://tractorpulling-emmeloord.nl/upload/file/duparalusakifuzufutujajuv.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607186a621a0f---renibinivapasidatuk.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/90aouplkqpf4983m667p4k6rsr/46597302790.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbb4.bin
75e36bcf61b411aea40e60ecca8e76e3b2251dc837be069454a65fc9b74a0895
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB4 5320 bytes
font_01_sfnt_off0000edbd.bin
00ccf3cfa2bf0e180f8122ccac8dc82a30ddfb97879d14e0a1251a6de0cfb2cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBD 12216 bytes
font_02_sfnt_off00011751.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x11751 4324 bytes