Malicious PDF — malware analysis report

Static analysis result for SHA-256 55eb582003eaa07f…

MALICIOUS

PDF

84.1 KB Created: 2021-04-03 11:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8faad18d3a122a548b8d5beb6b626e2b SHA-1: 11e8515232b271388020a970f06347110a8b83e6 SHA-256: 55eb582003eaa07f114f7e1da440c6769fbdc86c4d4babe265707aadccfb81f4
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://soxebez.ru/award?keyword=back+pain+physiotherapy+exercises+pdf PDF link annotation
    • https://kaxorude.weebly.com/uploads/1/3/4/0/134095875/6754419.pdfIn PDF document text
    • https://cdn.sqhk.co/tilesoxeg/EhfkVib/ccure_9000_user_manual.pdfIn PDF document text
    • http://uscreditmonitoring.info/superposition_theorem_online_calculatoro9wb5.pdfIn PDF document text
    • https://tawixepew.weebly.com/uploads/1/3/0/7/130739069/zupelefanudaxu.pdfIn PDF document text
    • http://devgame.design/macbeth_act_3_scene_4_comprehension_questionszq503.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzevunoxina/hegf8Ge/buying_guide_espresso_machine.pdfIn PDF document text
    • http://shopmzm.site/69470345586l58lk.pdfIn PDF document text
    • https://dekukosozo.weebly.com/uploads/1/3/1/0/131070054/16ed92e902017a2.pdfIn PDF document text
    • http://hookup154.space/college_student_resume_for_internship_template3mhf5.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://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_e7b918b1132142059054468302993f06.pdf?index=trueIn PDF document text
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_2e969af91eba4bab9b696bb16c93e17e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zukogi/90153848868.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/32654295745.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/47524049837.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/tv_programme_guide_melbourne.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/71505920987.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/48364374418.pdfIn PDF document text
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_3bacb6aabd8d4cd5be88b05b002d0d02.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA1 5280 bytes
SHA-256: 7ae5fc3e8a9210769e1229b4383f71b988d93d7ce763bc42dd432b898f0eb84b
font_01_sfnt_off00010f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F94 11024 bytes
SHA-256: 0b70dfc02ea74d97e08935bdc269d6cd157dc79bd45556b8434c8cd0f821758c
font_02_sfnt_off0001350c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1350C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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