Malicious PDF — malware analysis report

Static analysis result for SHA-256 d141b8f1d227f31e…

MALICIOUS

PDF

74.8 KB Created: 2021-01-15 00:07:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9428265ba11d8e9a8f2c723f37d73358 SHA-1: 7d6f85ab17f21979f35f643a64e274e512d2db74 SHA-256: d141b8f1d227f31ef38ead4391afdf6c7e345a28f63c0352637ea6c06a89e265
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body and embedded artifacts suggest it is part of a link farm or SEO manipulation scheme, directing users to external URLs like 'https://traffset.ru/aws?utm_term=aratinga+solstitialis+pdf'. The presence of PDF_SEO_LINK_FARM heuristic indicates a mass of external PDF links, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/aws?utm_term=aratinga+solstitialis+pdf PDF link annotation
    • https://site-1173424.mozfiles.com/files/1173424/jkbose_practical_date_sheet_2018.pdfIn PDF document text
    • https://site-1175088.mozfiles.com/files/1175088/auto_root_tools_v2__47_pc.pdfIn PDF document text
    • https://site-1168486.mozfiles.com/files/1168486/solar_system_3d_diagram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_5f9ee394a9cbf.pdfIn PDF document text
    • https://site-1253928.mozfiles.com/files/1253928/jigogalisoza.pdfIn PDF document text
    • https://site-1178278.mozfiles.com/files/1178278/jenoxubaxogewobusaluk.pdfIn PDF document text
    • https://site-1174034.mozfiles.com/files/1174034/99337796097.pdfIn PDF document text
    • https://sepanafawo.weebly.com/uploads/1/3/4/3/134316973/8817191.pdfIn PDF document text
    • https://site-1227540.mozfiles.com/files/1227540/fifarevafiginuxototak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/tatejogetapejenase.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/32360925847.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/kozelixiluxoreketukek.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/seduxafakogiwofaxavod.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/insurgent_movie_in_dual_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/belajar_bahasa_korea_pemula.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD914 4868 bytes
SHA-256: e87cad9f5a2a84761e2244fa0c19dbe5a4d9b2f892a03329aaf45dcea9f9db67
font_01_sfnt_off0000e99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99B 11100 bytes
SHA-256: 80a2ada9e9f0344e297d9a8c20901fe38b90feb90fd4b89658c545c03a5edbac
font_02_sfnt_off00010eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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