Malicious PDF — malware analysis report

Static analysis result for SHA-256 143f2b64e75453c9…

MALICIOUS

PDF

80.3 KB Created: 2021-03-12 10:39:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7011d3b28a0753ad332ad542a5d70924 SHA-1: a0b625823fda3bdc8aa892bd71141d831b696fbe SHA-256: 143f2b64e75453c99bc4e537cb707715123f49e21d9e79c73a42ee97baf95cf5
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, including one that appears to be a search query for specific content. The presence of multiple external links, some hosted on disposable domains, suggests an attempt to drive traffic or potentially distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://xajibur.ru/wix?keyword=life+and+death+twilight+reimagined+pdf+vk PDF link annotation
    • https://zazozoke.weebly.com/uploads/1/3/0/7/130776388/aa6654f9ff.pdfIn PDF document text
    • https://jivefumo.weebly.com/uploads/1/3/0/7/130776755/f1a1e8b08db8.pdfIn PDF document text
    • https://giboritozi.weebly.com/uploads/1/3/1/3/131379296/059ec9da3.pdfIn PDF document text
    • https://funoridarudaru.weebly.com/uploads/1/3/5/3/135304061/f18173c4.pdfIn PDF document text
    • http://sokavosutab.22web.org/essentials_of_diagnostic_microbiology.pdfIn PDF document text
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/kokigesisadesiziwi.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/605e5.pdfIn PDF document text
    • https://kaxebovirufuj.weebly.com/uploads/1/3/4/3/134399635/d446ffff8a329.pdfIn PDF document text
    • https://xufevojulan.weebly.com/uploads/1/3/1/3/131384667/nowixiganejeme.pdfIn PDF document text
    • https://jidedenevunuva.weebly.com/uploads/1/3/4/4/134498736/dirilidu_vigafeketamari.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://uploads.strikinglycdn.com/files/e12b3169-a9ac-4fa1-bae5-933b568af527/94373804528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a552e77-8503-46b2-b621-5dde88b8d8f3/popeloril.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b720105-91f4-45d7-9829-a60c3f6b5d76/bewuxuwujirike.pdfIn PDF document text
    • http://dukiduzafenej.epizy.com/brain_teasers_interview_questions_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ded8103-2cbc-48db-b657-31e73456d762/sabez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff290a2c-ed77-4894-999f-911abbe3404d/fungsi_database_management_system_dbms_adalah.pdfIn PDF document text
    • http://zegemipufe.epizy.com/zefege.pdfIn PDF document text
    • http://pusejik.epizy.com/apiculture_centre_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90eb657-7dfc-4857-b590-84b403f5c12c/61994463699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9104f5e-0ebd-4f4d-9d34-6daffc6efe72/maze_runner_movie_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f12080f-3b46-4f94-93d6-3a937b23ce78/resumen_del_libro_de_walter_riso_amar_o_depender.pdfIn PDF document text
    • http://saziwujezad.epizy.com/48925052913.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_off0000f284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF284 5112 bytes
SHA-256: 5a323ce74c681f1f15e3e75dcc122d4b01cd4251fe470365998a267c6d56d095
font_01_sfnt_off000103ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CE 9788 bytes
SHA-256: 27b8283fec8040c2c4475dcf15c5834f1426e15b784c589257a006ed35912ab9
font_02_sfnt_off00012551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12551 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361