Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05d3888924ebd8e…

MALICIOUS

PDF

86.1 KB Created: 2021-01-01 00:00:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a7f7fbb86d733d0476e0ea3a9a5f4206 SHA-1: e6df13648a2d7f796bbc447e89b663e54eedb7f3 SHA-256: c05d3888924ebd8eb84d2c22d49511a562980ba511657945c28279498abe425e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 PDF contains a large number of external links, with one pointing to 'traffking.ru', suggesting a phishing or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/123?utm_term=police+community+relations+and+public+relations PDF link annotation
    • https://gexeperi.weebly.com/uploads/1/3/4/3/134348656/7155871.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/1444009.pdfIn PDF document text
    • https://kuvanipugeva.weebly.com/uploads/1/3/4/4/134445248/210963.pdfIn PDF document text
    • https://dusexitope.weebly.com/uploads/1/3/4/6/134646398/baziziroguvog-teronekox-lifuxi-najaloka.pdfIn PDF document text
    • https://zalawevovupat.weebly.com/uploads/1/3/0/9/130969727/mimodupateg_davumikasefa_vubapep_sawaje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7204ac68-a476-4b16-b0bd-0c7abef713d9/35831985037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd103919-bdef-4185-bdc8-e76df2d47e28/pool_opening_kit_above_ground.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/77018075902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/782fbf5f-2940-4d9c-8081-a3414c0d3f7a/43283503760.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/xiaomi_mi_home_security_camera_360_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/differential_pressure_gauge_calibration_report.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/blast_furnace_guide_reddit.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
    • 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_off0000fd43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD43 5464 bytes
SHA-256: b7c374d4b88ca895191719acbf9c46a3d25dcb307b919235451446c7c5039655
font_01_sfnt_off00010fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC0 10960 bytes
SHA-256: 773b68c0bc0d9b054a91b6946c9f85441e1605672bcb89b08505a0928e5e6e4f
font_02_sfnt_off0001355d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1355D 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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